Slashdot Mirror
Laser Beam Teleported
Michael Wardle writes "ABC Australia reports that a team of scientists from the Australian National University have successfully teleported a laser beam. It seems that teleportation of solid bodies is still a way off, but at least we're a little closer to Slashdot's favorite super power." Another Australian newspaper has a more detailed story.
Jon Barrett has harnessed the power of lasers to be ableto appear on anyone's computer at any time, all while SPOOGING to defend the honour of his Queen, the Queen of Spain.
Hasn't this already been done?
What's so new about it this time?
Although teleportation of light beams could be very very interesting for telecommunication purposes.
Send lawyers, guns, and money!
One of my friends was telling me about a feature of quantum mechanics in which things or changes at least can be transmitted instantaneously. Does this have anything to do with how all this laser teleporting business works?
Sharpies don't just sniff themselves.
This is a message bearing laser beam composed of billions of photons.
-
It seems to me, that there is a huge difference:
Team leader Dr Ping Koy Lam says it involved creating a laser beam, its disembodiment and the recreation of the original beam in a different location.
To me, that sentence can be translated as such:
Team leader Ping Koy Lam says it involved creating a ball point pen, its destruction and the recreation of the same ball point pen using a factory blueprint in a different location.
This isn't the first time I've read about "teleportation" of some particle or another, when it seems that they are simply re-creating, mirroring if you will, the particle(s) quantum states in another place. That's not teleporting - that's mimicing.
Man is born free; and everywhere he is in chains.
Many bothans died to bring us this information.
Suppose they get this working with matter. Then it's just a matter of time before humans would walk into a chamber and be rematerialized somewhere else. The question is, who walks out of the destination chamber? Is it me or is it a reconstructed "me" with a different awareness, while the original "me" was destroyed? Even if it's a perfect copy, it's not worth the risk.
it's = "it is"; its = possessive. E.g., it's flapping its wings.
My computer was commandeered to post that!! Stupid slashdot open source "security"!!! Ignore this post!1 nothing to see here, move along, move along!!
Like the speed of light isn't fast enough for you?
Didn't you read the disclaimer?
This whole thing is wildly inaccurate. Rounding errors, ballot stuffers, dynamic IPs, firewalls. If you're using these numbers to do anything important, you're insane.
The One Rule Of Chess You'll Ever Need: Don't play someone who carries a kit in their bookbag.
If the lawmakers were actually interested in doing good, they might say that open source software is exempt from liability requirements (because if there are problems you could have seen them in the source!). So, liability could really be good for the FSF.
Team leader Dr Ping Koy Lam says it involved creating a laser beam, its disembodiment and the recreation of the original beam in a different location
The team was understood to be using a device known to insiders as a "video camera", although how it functions exactly was not disclosed during their press release
Here's the Quantum Teleportation page at ANU, which has a brief interview with Ping Koy Lam on the research page:
6 225/quantum.html
http://bohm.anu.edu.au/units/public/phys1007/s329
This seems great. I mean, what we have here seems to be taking a beam of light and transferring it to someplace else, and this is the clever part, at the speed of light. Woo woo!
Personally, I can't wait for them to do the same with matter. Perhaps they could take me apart and send me to McDonalds at 25 MPH. That would be fantastic!
=Brian
There is nothing so good that someone, somewhere, will not hate it.
I'd like to stick my tongue so far up Yancy Butler's vaginal orifice, I can taste what she had for dinner.
Mmmmm, mmmmm.
Say, does the party doing the duplication of the laser have to exchange information with the party doing the reading of the laser for this process to work?
If not, why not stick a duplicating end on Mars or someting, read it on Earth, and let the spookiness do the rest?
The notion of teleportation in regards to the destruction and rebuilding of an object reminds me of this book I read a while ago. I forget what it was called, but it was about a boy and some robots and they were trapped in some maze thing or something. Anyway, it explained the teleportation of matter in this way. And it had some interesting points on the morality of teleportation transportation.
For example, what are the theological or philosophical repercussions of killing and rebuilding your physical self?
I dunno, but it's something to think about.
>Is it me or is it a reconstructed "me" with a
>different awareness, while the original "me" was
>destroyed?
What do you mean? If the 'new you' is constructed as an identical copy (down to the electrochemical set-up of your nervous system at the exact time of teleportation), the 'new you' will indeed be indistinguishable from the 'old you'. It will be the same.
This should actually be a good test for the existence of the soul as separate from the body - if such a soul exists, the result of teleportation would be the removal of the soul from the body. Of course, if the results of teleporting humans are identical to the originals, I'm sure the fundamentalists will find some entertaining way of avoiding the truth, as they have done with evolution.
Aha! So that's what they burgers are made of!
___
If you think big enough, you'll never have to do it.
Well, I never mod anything up that's already at three, four, or five. I only mod up stuff at zero, one, and two. (Usually just ones and twos, though). I almost never mod down, because I can count on someone else to mod down something that truly deserves it.
Finally, if you don't like how stuff is getting moderated, metamod
Brian Voils
"A university is what a college becomes when the faculty loses interest in students."
*Oh, sorry, did I just spoil the book for you? Well, tough gornt, kid. Speaking of which, have you heard the one about the Bothan and the gornt in the cantina?
Using a process known as quantum entanglement, the researchers, led by 34-year-old physicist Ping Koy Lam, have disassembled a laser at one end of an optical communications system and recreated a replica a metre away.
Quantum entanglement allows what Einstein termed a "spooky interaction" at a distance between two objects at the speed of light.
An encoded radio signal is embedded on an input laser, which is combined with entanglement and then scanned. The laser is destroyed in the process.
But the radio signal survives and is sent electronically to a receiving station, where within a nanosecond an exact replica of the beam - with the radio signal intact - is retrieved and decoded.
Am I missing something or are they doing this quantum entanglement at over 3 times the speed of light? 1 m/ns = 1 000 000 000 m/s = 3.3 c
where c=299 792 458 m/s
This process is getting spookier and spookier.
In the more "in-depth" article they say "- disassembling objects in one place while a perfect replica is created elsewhere -". - If they are doing this with a laser beam, how the hell do they know they've done it? Are they not just shooting a laser beam into a wall and then making another one somewhere else? This stinks of two idiots with a camera and a laser pointer. - I'm gonna go out side and teleport some vitamin-d into my system while my friends teleport a football back and forth. It should be great fun. -
How is this different from "teleporting" a sound wave by using a microphone and a speaker?
Can anyone give a layman's explanation of how the information is getting passed from point a to point b?
i hope M$FT does not get involved in this, what if the computer BSODs when someone is in mid transport??? better get Linux to run it...
Quantum entanglement isn't nonsense, and I don't imagine that this teleportation experiment necessarily is either, but the article on The Australian site certainly seems to be. Am I the only one who found it to be incredibly poorly written? I'm somewhat familiar with the principles involved, but I couldn't make heads or tails of most of it.
More detailed my foot - it was gibberish. There were definite erorrs (a previous post already pointed out that the "spooky interactions" are instantaneous, not "at the speed of light"). It's a real shame, too - this may be near-sci-fi technology, but it really isn't so arcane that a little basic proof-reading couldn't be done on articles about it.
This sounds vaguely familiar. Why is it that people feel they must claim other people's work as their own. And no, I'm not trying to say I wrote that.
My other sig is an import.
In the headlines it reads TELEPORTATION, but then in the discriptions they are very carefull to call it a "replication". This seems to be a pretty big hoax, call it what it is, or just admit you have been watching too much Trek.
Dr. McCoy was right!!!!
Anyone looking to be replicated to their desired vacation destinantion? Im not.
"Doctor, it's not the voices I hear in MY head, but the voices I hear in YOUR head that really frighten me."
Yeah I thought that was pretty funny too. I think the reporter is wrong, though -- the spooky part is that it happens *faster* than the speed of light. I'm pretty sure about this, in fact, because there's a famous Einstein line about "spooky action at a distance" referring to faster-than-light quantum effects, which I'm pretty sure the scientists quoted would be aware of.
That being the case, everyone here is totally missing the point. And in fact, the reporters who wrote the linked-to story missed it to, despite this quote:
The bits about teleporting solid objects (including humans) were just humoring the reporter -- sort of like the whole "could this experiment destroy the universe" thing surrounding supercolliders. The true interesting practical application of this is FTL communication -- vital for any space missions going much further than, say, Mars -- and pretty handy even if you're only that far away.
The "spooky action at a distance" is a weird consequense of the heisenberg uncertainity principle. It 'appears' to be an interaction, but in fact it's just the result of the coherency between two 'entangled' wavefunctions.
the 'yes' part is that to receive a teleportation, you have to have one of the entagled particles, and a measured quantity.
the 'no' part is that since the measured quantity is transmitted classicaly, there's no FTL transfer of anything.
-Kz-
Such as anti-H1b posts. Slashdot is now part and parcel of the business class, which supports the importation of cheap labor, which is why I get modded down. What really disgusts me is that I have the same karma as the First Post idiots. WTF? If that aint censorship, then there is no such thing!
This post is protected under the DMTA (Digital Millemium Trolling Act). It is illegal to moderate it as a troll.
Yeah, right. From the article: ``Team leader Dr Ping Koy Lam says it involved creating a laser beam, its disembodiment and the recreation of the original beam in a different location.''
c olor(oldcolor);
So they send some laser-beam, eat it, and then create another one with the same properties somewhere else. Look ma, I can teleport pixels!
oldcolor = getpixel(0,0);
setcolor(0);
putpixel(0,0);
set
putpixel(10,10);
Please correct me if I got my facts wrong.
I mostly agree with you because:
Witchblade : Yancy Butler
Alias : Jenniger Garner
The Practice : Marla Sokoloff
However, Charmed is just stupid with every cast member being annoying and just plain ugly.
Never seen your schlong show. I'm thinking I'd rather watch Charmed.
Well, this is an interesting intellectual curiousity, but really has little use.
The problem is that the quantum state has to be communicated to the source for the laser beam to be transported. These communications are done through classical communcation channels, and therefore the fastest you can teleport a laser beam is at the speed of light. Which raises the question of why don't they just send the laser down the pipe to where its supposed to be. As well, with Shannon's information theory put in this would actually be a slower way to communicate information.
Thus, it's very nice to see that they have made some more progress with quantum teleportation, this isn't that revolutionary since the communication speed is still limited by the speed of light.
~ kjrose
I just cant wait to shuck my super-expensive Australian ADSL and hook up to a network that transmits my data instantaneously. You could have true direct connections - no bouncing around nodes, which would mean that international exchanges of data (which is why Aussie broadband is expenses) wouldn't cost any more or less than ones to your nextdoor neighbour. It seems to me (and I know nothing about quantum mechanics other than the very bare bones) that the only service youd need to pay for would be some sort of naming service to determine where to send your data - then you just go direct. That would cut net costs down a bit too. Quake 3 with lag limited by the speed of quantumn translation!
Just because you're paranoid doesn't mean there isn't an invisible demon about to eat your face
As any teleportation device could clearly be used to replicate 'N Sync CDs, its use will be obviously be prohibited by the DMCA.
ok then your [sic] infringing on my copyright! Could you as [sic] me next time before STEALING my comments for your own?
The blueprint analogy shows a lack of understanding of entanglement. There is no blueprint at the receiving end, and no measurement and communication of instructions to replicate the properties of the sending photon. What happens is a seemingly spontaneous change in the properties of the receiving photon.
Whether this is teleportation or replication is more of a philosophical question, or maybe a matter of semantics. Is an object (or a laser beam) equal to the sum of its properties? If you can make the sum total of an object's quantum properties disappear from one place and reappear in another place, have you merely copied the object or have you moved it?
I think you've moved it, but questions like these deserve more than offhanded answers.
Has anyone found a better writeup of this? I work in the field, and still can't understand what they did! The media release from the Minister of Science is the worst of all.
If the process involves ripping apart the object and getting the information so that you can reassemble that object later. Couldn't you just store the template and create as many copies as you want? Then not only have you created a teleporter, but also a replicator as well.
When the tech progresses. Someone is going to have to climb in and give it a whirl. If you come out the other end and are still 'you'. As in, 'I' went in, and 'I' came back out. Then, we know that we are no more than collection of particles in a distint state.
I'm not claiming it as my own, I'm hoping to make it more widely known.
Slashdot has successfully teleported a months-old story to its current front page. Thankfully, the process does not work on Jon Katz.
Say, it wouldn't be possible to, like, enlarge parts in the process?
Is it too much to ask for me to get sharks with FREAKIN' LASER BEAMS mounted on their heads?
Zippit...
thats why you should AC it... you'd be much, much happier in your trolling.
I have a shitty sig!
Well, what more can you say about the man who quantum entangled a rant on a 1 1/2 year old bad movie to the present day? Screw laser beams... We're teleporting cinema here on Slashdot.
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should be non other than Bill Gates. If we cant get Bill, I'd settle for CowboyNeal.
... and what would you do if something went wrong and the original WASN'T destroyed after the "new you" was created.. would you just say "oh damn...I'm still here too, better shoot me quick?". I would get cold feet and run! Then there would be 2 of me running around.
hmm..
AOTC directors cut?
It seems to me, that there is a huge difference:
Team leader Dr Ping Koy Lam says it involved creating a laser beam, its disembodiment and the recreation of the original beam in a different location.
To me, that sentence can be translated as such:
Team leader Ping Koy Lam says it involved creating a ball point pen, its destruction and the recreation of the same ball point pen using a factory blueprint in a different location.
This isn't the first time I've read about "teleportation" of some particle or another, when it seems that they are simply re-creating, mirroring if you will, the particle(s) quantum states in another place. That's not teleporting - that's mimicing.
A more effective moderation scheme would require several votes to increment/decriment the value of a post. The really good posts would be more likely to be really good, and the bad posts would be more likely to be bad. And as a bonus, the chances of vindictive moderation decrease as well since one vote alone could not move a score below the default threshold.
Requiring multiple votes to increment or decrement a score would also reduce some of the satisfaction people get from moderating. I imagine some folks moderate not because of percieved quality of a post but how moderation makes them feel. Requiring multiple votes to change the value of a score would mean that the person would not immediatly see a change of score with the votes they cast. This breaks the cause effect relationship, since the reward of seeing the score change is removed. This should reduce the number of people who moderate impuslively for shallow reasons.
I could go on but already the old addage about the futility of advice giving is reverberating in my mind, and this little postage stamp sized editing box is...unpleasant.
Thing is, the strongest point in this post is not true. There are always more +2 posts than +3 posts and more +4 posts than +5 posts. Check this story, check every story. What you're saying is not true.
And with this ... nobody knows where the laser beam went to.
It is surmised that it is currently in time-space next to the time-machine that was invented several years ago, switched on ... and summarily disappeared.
Karma? Karma? I don't need no stinkin' karma.
So if you don't like the way your day has gone, you just recreate yourself the next morning from your backup you made the day before, so that you can have a rerun. And you can make a backup before you do anything dangerous, and ...
:)
**Enterprize is caught in a long range tractor beam
***HACK HACK HACK CHOKE!
Kirk: Rauh! Rauh!
May be we'll create long range tractor beams from the teleporting laser beams?
But what if they create a replica of me at the other end, and forget to destroy the original me at this end?
Will that mean there are two of me?
And can I go to more than one destination at the same time? (My life as a forked process)
Still, no more 24-hour plane trips to the other side of the world. Cool!
I am anarch of all I survey.
Hold up! This article isnt about faster than light data propogation. Its about encryption. The radio signal still has to cross the distance. The interesting thign here is that it allows you to have two different "one time pads" that change constantly but are also always in sync. This is quantum entanglement. You cant ever send data through this effect becuse my measuring it you change it (and for the other guy to). But you can use it like they have. Bascically this allows you to produce "perfect" encrytion. It dosent move and faster than you can transmit the radio signal.
Anyways, I could be wrong - whadda I know.
This is not meant to be argumentative, I am actualy curious...
If this is the case, then why can paralysis victems not regrow their nerve cells in order to walk again?
What's the point of moderating?!
If the person who ultimately discovers teleportation gets a patent on it, they will have the power to completely eliminate the patent system.
Here is an informal talk by Samuel Braunstein on the problem of teleporting humans.
17779 eligible voters in a district, 17779 'vote' as one. This is Russia.
The article says:
Using a process known as quantum entanglement, the researchers, led by 34-year-old physicist Ping Koy Lam, have disassembled a laser at one end of an optical communications system and recreated a replica a metre away
and
But the radio signal survives and is sent electronically to a receiving station, where within a nanosecond an exact replica of the beam - with the radio signal intact - is retrieved and decoded.
I'm having trouble working out whether that nano-second is the elapsed time from when the original beam is destroyed and the new one is created, or whether it's the amount of time required to recreate the beam from the received radio signal.
If it's the former then we're talking faster-than-light teleportation here because it takes light 3 nanoseconds to travel a yard.
"An encoded radio signal is embedded on an input laser, which is combined with entanglement and then scanned. The laser is destroyed in the process. But the radio signal survives and is sent electronically to a receiving station, where within a nanosecond an exact replica of the beam - with the radio signal intact - is retrieved and decoded."
First, a simplified definition from my very limited research into Quantum Entanglement: The supposed link between particles that have once interacted, enabling them to influence each other instantaneously over indefinite distances.
I'll mention before hand I'm not a quantum physics major of any sort, but if I'm reading this correctly, they have encoded a laser beam with a radio signal and "quantum entangled" the two mediums which is then "scanned" (whatever the hell that is) in which the laser is destroyed in the process. So now we should supposively have an intact radio signal with a "destroyed" laser sub-atomically anchored to it in ether somewhere. Sending this radio signal downrange to a receiver will recreate this signal and "pull" the laser back into reality (pardon my butchering of terms).
My problem here is perhapse not how unbelieveable this sound, but how damn vague the artical is. Scanning? How the hell was the beam recreated? Did it appear from thin air? Did it have to be "un" entangled? It doesn't seem as if the laser is infact destroyed at all... How do you go about "entangling" something to being with? This artical doesn't simply bog you down in scientific explanation; In fact it doesn't bog you down in ANY explanation for that matter-- it throws some words in and stirs them up with teleportation references. Hell, the only way I could figure out ANY details was independent research, and oh, how fun that was. The above definition was as easy as it got. After that? Whew... Maybe I'm just bitching, but I'm asssuming this article was written for the common man, but goes far beyond watering things down. It leaves out key pieces nessisary for understanding to occure. Jeez, that's shitty writing...
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But for teleporting humans, what matters is first of all the classical physical structure: the DNA sequence, arrangement of membranes, intracellular locations of proteins, and all that. There is no indication that you need quantum mechanical information or even dynamical information in order to make teleportation work.
Maybe it will be quantum mechanical tricks that ultimately make teleportation feasible. But these results so far really have nothing to do with the teleportation of real-world objects, because they don't solve the hard problem. The hard part is not transmitting entanglements, the hard part is transmitting the instantaneous locations of molecules in 200 pounds of matter and recreate them at the other end nearly instantaneously.
I have a great idea for a device which will employ this new technology...
How about a device that will teleport the laser back into the eye of the dumbass teenager shooting his laser pointer on the movie theater screen?
-- We live in a world where lemonade is artificial and soap has real lemon.
>Even if it's a perfect copy [of me], it's not worth the risk.
Hollywood scrambled today to introduce the anticipated Corporeal Copy Protection Bill (CCPB) on Capitol Hill. The bill requires all copies of teleported matter to contain access control technology that prevents reconstituting by unauthorized parties.
"With analog teleporters, copies of celebrities degrade over time, keeping celebrity piracy at manageable levels," said an alarmed Jack Valenti of the MPAA. "With this new technology, anyone can download their own perfect Natalie Portman off the net.
"Miss Portman's body is the legal property of the MPAA. We suffer irreparable financial harm if she suddenly appears in every amateur, indie, porno, and home movie on the planet."
Breaking from the MPAA's stance, Universal promised to offer cheap digital downloads of popular celebrities. Their initial catalog will include Roseanne Barr, Camryn Manheim, and "Mimi" from the Drew Carey show.
Democracy is two wolves and a sheep voting on lunch.
Someone hook a honkey up with a mirror or something.
-- Note: If you don't agree with me, don't bother replying. I won't read it.
And that's my problem with whoever wrote this crap. It's obviously dumbed down for people who know nothing about quantum physics (me), but then doesn't even provide the clues for basic understanding. My half hour google search revealed:
Quantum Entanglement: The supposed link between particles that have once interacted, enabling them to influence each other instantaneously over indefinite distances.
Da Mullet's interpretation: Once the two mediums are "entangled" (how you do that is anybodies guess because the article sure as hell doesn't say), they are mysteriously anchored to one another, partical to partical regardless of distance. THEREFORE... While you can "destroy" the laser beam into a chaotic mess, those particals are still mysteriously anchored to their radio counterparts. According to this article, they have destroyed the laser and it's signal, but transmitted the radio to a reciever and have been able to recreate the laser via quantum entanglement effect. The radio partical's laser counterparts (supposively scattered around incoherently) are pulled back from ether to create the original laser signal at point B.
That's the best I can do. Hope it helps, cuz the author sure didn't.
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The RIAA has deemed that it can be used to for piracy and therefore will be outlawed.
This signature is a waste of 42 characters
It would be even better if it didn't have propagation time but hell, I'll settle for the speed at which a laser normally travels through a fiberoptic cable. That wouldn't disappoint me at all.
"You're right," Fisheye says. "I should have set it on 'whip' or 'chop.'"
Just think about it. Build a "teleporter" that doesn't destroy the original object. You could duplicate anything perfectly.
"Who wants the Mona Lisa? Just 5,99$."
But what will be 5,99$ if you can duplicate anything?
Altrough there will be possitive points to a machine like this(example: vital organs duplication), it could really mess up our way of life.
So, like the Fisherprice slogan: "Oh the possibilities!"
The poster is correct really... at least in the way I see it, as do many others:
* If there is no such thing as a soul, then who we are is merely the makeup of all our component parts, the electrical charges, spins of atoms etc. in our body at any given time. If you can duplicate us down to that level, then you would be able to create an EXACT replica of us. Including all memories (As they are stored as cell configurations, electrical charges etc. in our brain), personality etc.
HOWEVER
* If we have a soul, something other than what is physical, something which transcends the merely atomic level, something which continues on after the death of the physical body... then if you make a perfect physical copy of the body, transport it to somewhere else, and destroy the original... where does the soul go? If we are more than just the bits and bobs that we are made up of, if who we 'ARE' is defined by the soul, then whatever comes out of the transporter at the other end would not be us... The soul would have been seperated from the body....
OR
* If you think that the soul could just follow the copy of the body to whereever it went... then what about if you use a transporter without destroying the oringal... what if you create a perfect 'clone'... then the soul would be in the original, and the copy would be 'soul-less'...
That's how transportation can be a good test of the soul... that's why it would be so fascinating... that's also why it's scary as hell... just what the hell are you going to get out of the end of one of these things?
Simon
it's so funny ... the original transporter on star trek was introduced because they lacked the budget to handle shuttlecraft scenes. the famous roddenberry quote is "what if they just appeared there?"
and here it is, inspiring cool science. neat.
-- p
Now all we need is for Cowboy Neal to be cloned...
Cowboy Neal on demand - teleported straight to your house. Yours to keep for only $1000!
My big question would be what the "speed" of the information propogation was. Some say it should be c, some say it should be "instantaneous" - either way, the results will have substantial impact on our view of several well accepted physical models.
"It is our blasphemy which has made us great, and will sustain us, and which the gods secretly admire in us." - Zelazny
Hell, it was an outer limits episode too. Aliens gave humans teleporter technology, but the human operator finds out that the originals are actually destroyed while their copies go about their daily lives thinking nothing but transport has taken place. Of course, the guy went insane... Until you can quantify what truely makes us different from life without consciousness, you're not going to be able to answer that question. if we're just building blocks to be taken apart and put back together, then there shouldn't be much consequence at all. If there is more, something governing those blocks beyong the physical, then you'll be running into quite a few moral dillemas.
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Sorry, another post on the main, but there are applications far beyond encryption... Try non-line of sight laser bombardment. Still, they never mentioned what it took to re-create the laser anyway. And that's assuming this isn't just cold fusion or Internet though your AC outlet...
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Hell, according to theory you should "just" be able to entangle matter to a carrier and atomize it with the death-ray of your choice. After all, those sub-atomic particals should be bound to the carrier no matter where it goes (chuckle). Recombination, on the other hand....
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I hooked my fax machine up to my shredder tonight and teleported atoms from my home to my office.
I really wish they wouldn't hype it up as 'teleportation.'
I don't doubt that the research has demonstrated some useful phenominon, but its hard to find much excitement in a bunch of claims that 'teleportation of humans is a ways off yet.'
I was under the impression that the change happened "now" as in instantaneous and that it was FTL due to something, which did not break against some law. Appears I've been wrong. Or have I?
The idea behind Quantum entanglement is that two particles are generated and entangled at a single source and then split and sent off in different directions.
The spooky part happens when someone fiddles with one of the entangled particles, the other particle immediately reflects that same fiddle in Zero time FTL communications.
This effect was discovered back in the early days of Quantum physics with the 2-slot experiment, causing Hiesenburg to postulate his uncertantly principle.
The reason it hasn't been exploited until now is that the technology has not been available to detect these changes without causing interference.
Who ever wrote the popularist teleportation thing is on some serious bad "PR drugs".
Bruce
I'm cool with being sent in this "destroy the original and recreate" thing so long as they don't transmit the UDP...
me: "Where's my frickin' legs, assmunch?"
technician: "Sorry mate, packet loss."
graspee
how the researchers state that the main hopes for it at this point are as an amazing encryption device, and yet 99% of the comments are about teleportation of matter.
instead we will have kernel oopses mid transport
and the poor soul won't even be able to see a colourfull death
...the Second Law of Thermodynamics.
Teleporting a solid object without destroying the original? Sure, sounds nice. Now what are you going to make the one at the other end out of, and where are the 1.21 gigawatts needed to do it going to come from?
A lot of people have been talking about this in terms of matter transportation a-la Star Trek.
An article I read recently on Wired mentioned a theory that "conciousness" may be the electromagnetic field of our brain interacting with neurons.
A device like this wouldn't copy the field, would it? Or can these things be expressed in terms of quantum "particles" as well?
..and I'll form the head!!
If that aint censorship, then there is no such thing!
Well they could delete your posts.
The moderation system sucks though. The very fact that there is a presumption that certain posts will be "less worthy" than others promotes trolling...
According to this article, a photon can be read, then duplicated. Does this mean that the 'Perfect Encryption' described in this article has now been broken?
There's a great short story by Stephen King that explores this concept, called "The Jaunt". It deals with teleportation, where those undergoing teleportation have been found to be in a fine physical state when they emerge, but are completely violently batshit in the head. In order to stop this happening, "travellers" are put under anasthetic while they undergo teleportation and they seem to come out fine. The story deals with the case of one person who skipped the anasthesia and the resulting consequences, and essentially their soul / consciousness is stripped from their body. The body arrives instaneaneously, the soul just floats around in space for several trillion years until it finds it's body again.
-"I still believe in revolution; I just don't capitalize it anymore." - srini!
The original Mona Lisa, in good condition. Bidding starts at $20 million.
The item will be sent either via FedEx or by FAX machine, buyer's choice.
Donate background CPU time to fight cancer.
Whether this is teleportation or replication is more of a philosophical question, or maybe a matter of semantics. Is an object (or a laser beam) equal to the sum of its properties? If you can make the sum total of an object's quantum properties disappear from one place and reappear in another place, have you merely copied the object or have you moved it?
Well, the only way to really figure that out would be to do a quantum measurement on each particle in the beam and seeing if there is any stray particles that weren't in the original, missing particles from the original, or some odd combination of both.
-TDA-
There's a word for moving a object from one location to another whilst maintaining the continuing existence of that object - it's called transportation.
dictionary.com defines teleportation on the other hand as "A hypothetical method of transportation in which matter or information is dematerialized, usually instantaneously, at one point and recreated at another."
so does this mean that i cant give the excuse "sorry but the traffic was hell out there" when im late for work? dang!!
We played dungeons and dragons for 3 hours.....then i was slain by an elf
As far as I can understand, they are not saying that they are exceeding the speed of light, but that the 2nd pulse is appearing before the first pulse, while the opposite should be the case.
Even if they exceeded the speed of light a thousand times, the 2nd pulse should always appear after the 1st. The thing they mention about 310c (and not 3c) is not the speed of transmition, but the difference in delay times.. it is mentioned in the FAQ.
I miss my rubber keyboard.(Homepage)
I teleported home one night,
With Ron and Sid and Meg.
Ron stole Meggie's heart away,
And I got Sidney's leg.
"Information wants to be paid"
Why do we have to beam Kirk and Friends down to the planet to shoot things, when we can just stay shipside on the other side o' the planet and teleport phaser blasts into the Komm's and Yang's asses for a laugh?!?
I'm only asking...
Mmmmmm... Bold, yet refreshing!
I turned off the light in the bedroom and turned on the hallway light..
Quantum teleportation is not new. It has been done and published 1997 [Nature vol.390, 11 Dec 1997, pp.575] by Weinfurter & Zeilinger. The experiment was in Innsbruck, Austria (which is not a typo of Australia). The website contains interesting details on the experiment.
This sig is a true statement, but I cannot prove it.
Teleportation needs the transportation of particles and a channel for classical information. So, for teleporting 1 photon, you will need 2 fibre cables.
What does "propagation time but hell" mean?
This sig is a true statement, but I cannot prove it.
Can someone refresh my memory, please: does quantum entanglement work instantaneously, or at the speed of light ? In the second case, this "quantum teleportation" would be no more interesting than just beaming a laser the conventional way... by shining it on things. How does quantum entanglement work, anyway ?
>|<*:=
Downloading Britney Spears....61% Complete
Will code a sig generator for food
yes, it IS faster than light teleportation!
quantum entanglement is instantaneous, not at the speed of light. the article was mistaken and actually *somewhat* corrected by one of the comments at the bottom of it. teleportation is just a neat word the press uses to describe what they are doing: quantum entanglement communication. that is what is important. since it IS instant, it does break einstein's laws for no communication faster than the speed of light. this needs to be tried at large distances, like across the world or, say, to mars.
QED
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Well okay, there's always the irritating second-and-a-half delay on satellite link-ups, and I guess this could be useful for Mars or interstellar missions but for terrestrial applications I'd much rather have high bandwidth than fast carrier speed. Look at it this way - which would you rather have: nanosecond pings or terabit ethernet?
An important problem is getting both ends of the nerve cells to connect to each other again. They can't automagically find each other. A cut nerve will usually grow a bit and give up when it doesn't reconnect very quickly.
There is some early work on producing scaffolds that lead the nerve cells to each other and keep them multiplying until they reconnect.
The Drowned and the Saved - Primo Levi
superluminal photons are old news.
IIRC, though, superluminal communiaction , i.e. passage of information is considered impossible
(the fact the WF collapses does not imply passage of information, as you need to know the information measured at source to decipher the destination state)
I very much doubt they achived this.
Working for necessity's mother.
holy wacked-out shit, batman!
Don't quote me on this, but it sounds like the "teleportation" speed is directly dependent upon the speed of the particals entangled. Thus you can entangle a laser to a radio wave, but you have to wait until you recieve the wave until you can reform the laser 'x' distance away (thus, the light speed limitation). The only advantage I could see would be non-Line Of Site transmission of what you are teleporting. As for how QE works, I can only give you a definition (search Mullet on the main thread). How it actually accomplishes the definition? It's going to take more than a quick search to find that out, but suffice to say it wasn't worth the time to wade through all the high level physics explanations I found.
You need a FREE iPod Nano
Ok Imagine this...
You cannot see, hear, taste, smell or feel ANYTHING
Just as if you we're completely blind, deaf, numb, etc..
So you can no longer interact with the world as we know it (barring future genetic engineering of telepathy...which would be really useful)
So how do you know your consciousness isn't just running out of a computer [albeit a Pentium 10^254].
The point is that you *can't*. The whole teleportation thing works this way too. Granted some neuralyzer technology from MIB you wouldn't know if you had flown or telepoted to where ever you are. And no one else would either.
so instead of destroying and recreating, what about just recreating? Seems like a simple way to create clones at will. Just like when Riker's (STNG) transport signal was split in two, thereby creating an exact copy of him.
Right Here
What's in a Sig?
...Data modulated on your AC or a seprate physical line with your AC? Thought the former was a proven scam... Thanx for the update.
You need a FREE iPod Nano
You cannot allow down moderation of political viewpoints. Period. Until you stop this, Slashdot moderation is, IMO, BROKEN!
This post is protected under the DMTA (Digital Millemium Trolling Act). It is illegal to moderate it as a troll.
Got a golden ticket? Your imagination's the limit.
The age old teleport question:
Are we killing ourselves again?
cp original copy
rm original
Causing Chaos Everywhere,
Nik J.
The strange world of a loner, in a populous city, drowning in society
Then why not give credit where credit is due. Or at least take it out of first person.
My other sig is an import.
This is just like on the one show ... Star Trek ... anyone see that one?
"We shall party like the Greeks of old! You know the ones I mean." - HedonismBot
Hey, they're reporters, not Quantam physicists! Ever had an event that you were involved with, or knew the person involved with it appear in the newspaper? Did they get that right? I've made my point.
:)
When it comes to REALLY complex issues like the in's and outs of quantam physics and teleportation, the reporters/media are SURE to really botch it up... it's in their nature
I am not a physicist, but I seem to remember a discussion of FTL properties implied by work by Einstein-Podolsky-Rosen and extended by J.S. Bell.
The particular discussion I remember involved the emission of paired electrons that travel some arbitrary distance. When the path of one of these electrons is altered by some external force, the path of the paired electron is also instantaneously diverted (with some limitation due to frame of reference) in an equal and opposite direction, implying an FTL transfer of information, if not of matter or energy. As I remember, this has an intense impact on the assertion of local causality. Google seems to turn up a large number of references on this subject.
In any case I do not understand why practical applications of this phenomena have not yet been developed.
Please pardon any inadequacies of this summary; I am a lowly engineer and computer scientist entirely unqualified to be commenting on such lofty subjects.
There's plenty of self. You're capable of saying "I am". You remember what you did 10 minutes ago. You don't remember what someone in Saigon did 10 minutes ago. This is the aforementioned sense of continuity. It's the basis of sentience. You're misinterpreting Buddhism if you believe it says otherwise. And you're also judging all Buddhism based on Zen Buddhism, which is not really Buddhism. It's Taoism. The Heart Sutra states that everything is "the same". That there's no ultimate division between you and me. That's not the same as saying there is no you and there is no me. To your statements, I say "mu".
I don't believe in the soul, but this argument could be rewritten with that word. I choose the word "identity." You will never teleport me, because if you did I would lose my identity.
I believe we are more than just brains and tissue and memories; we are the sum of ALL of our parameters. Our identity depends on that location parameter too. How do we reconcile this view with the certain knowledge that our parameters are changing constantly? We are constantly moving, our cells being born and dying, our mood swinging, or memories collecting. Identity isn't just the set of parameters as it is right now, it's a continuous function which shows our path from single unfertilized egg cell to the sum of all those terabytes of data which make us up as adults.
To teleport me into another location, you recreate my exact characteristics in the new location with a new location parameter. Whether or not the original continues to exist is irrelevant; the new me is not the old me. You have created a discontinuity in my function. Identity is continuity.
Let's talk about that important concept, identity.
# The set of behavioral or personal characteristics by which an individual is recognizable as a member of a group.
# The quality or condition of being the same as something else.
# The distinct personality of an individual regarded as a persisting entity; individuality.
The dictionary is telling us that it means both "the same as something else" and "distinct, individual". It's almost a one-word oxymoron. Certainly if you have been teleported in a process which can conceivably leave behind, even for a millisecond, a copy of you at the starting location, you are no longer individual. That sense of identity has been violated.
What about the second sense: The quality or condition of being the same as something else. But if a being has been teleported, the new being is not "the same as" the other. They do not share identity because of that discontinuity. The old me has to be destroyed, the new me has to be born, and they do not share the same location, so they do not share the same function, so they are not the same waveform, and they are not the same entity.
It's rare that you're presented with a knob whose only two positions are Make History and Flee Your Glorious Destiny.
Hopefully they can productize this in the next decade or so, and the Mars explorers can take one with them.
This way, they won't have to wait many minutes between sending and receiving messages with Earth.
BTW, it's a 'subspace communicator', not a 'teleporter'. C'mon, get your bad Sci-Fi right.
My God, it's Full of Source!
OUTSIDE_IP=$(dig +short my.ip @outsideip.net)
In response to the Teleportation vs Recreation Issue.
:
I think the issue does not lie in wether we are transported or recreated. For inanimate objects the topic is moot at best. However for anything with a conceptual 'soul' a conciousness, all of a sudden the heebie-jeebies make a lunge from the dark again.
The question is will my conciousness be transported with me? Or will my conciousness cease and a seperate conciousness belonging to the replica take over - consisting of all memories involved. Where's the connection? Where's the continuity?
I have a short analogy to describe why this, in all contextual terms can and will teleport a human being in all conciousness (assuming that the relevant technology is developed to allow entire atoms to teleport).
Imagine that you are frozen. This is akin to placing one under anaesthetic sleep also. So when u wake up are you still there? Whole? Yes... I'd say so.
Now consider that while you are frozen, a few atoms in your right toe are replaced with identical, but differing, atoms. When you wake up are you still there? Whole? Yes, I still think so.
There's no massive desynchronization involved here. So where's the threshold? a foot? a leg? a body? What about the brain? that is after all, only material composition as well.
Consider this
While you are frozen all the atoms in your body are one by one replaced by identical atoms. You wake up. What has changed? Nothing. You have a fresh set of atoms but that's about it.
Now Finally :
While you are frozen your atoms are replaced one by one. But they are replaced by atoms in a different location. When you wake up everything is the same, however you have adopted the new location.
Note that conciousness is analogous to your physical body in this manner.
So long as the instance of yourself doesn't simply blink out of existance at any one point in time, it is safe to assume neither does your conciousness. Subsequently, your conciousness would be transported also.
The difference between teleportation and recreation in THIS sense is that if firstly something ceases to exist completely, then a copy is made afterwards - that is recreation. Otherwise teleportation applies with all its perky bonuses.
ROFLMAO. Where are mod points when I need them...
"Rub her feet." -- L.L.
here.
If only I could literally know what you're thinking, I would have no way to argue with that perspective.
It is not faster than light. Observable information never moves faster than light, even in Quantum Mechanics. It's true that entangled particles can "communicate" in a sense faster than light with eachother, but classical (measurable) information will never move faster than light.
In this experiment, a radio signal was sent between the teleportation sender and the teleportation receiver. At each end, there were some particles entangled with the particles at the other end, however, the classical information - that is the laser beam - could not be reconstructed without sending a radio signal (at the speed of light) from one end to the other.
There's no reason for a sig here.
Also a shame that nobody knows how to spell Crichton...
How many Slashdotters cannot spell the word ARTICLE.
heh, so when are we going to be able to threaten the world saying, 'hey, give us your oil/money/bombs/women or we'll teleport laser beams to hit your leaders' heads.'
talk about stealth assasination. maybe we could even teleport the beam in, let it do it's job, then teleport it out. all this, of course, in a fraction of a second. and no trace!
This is plainly not true if you take a moment to think it through. Think of any two atoms of a given type (or quark, or smaller). Down at the quantum level, they have the same structure, but having an identical structure does not make them the same atom. A crucial part of identity is location in space/time. The hydrogen atoms in the glass of water at my desk are structurally identical to the atoms elsewhere on earth, but their location makes them unique.
This property of identity also holds true on a larger scale. If individual A is perfectly 'copied' that does not mean there are two As, it means there are two individuals, A plus the copy.
but if they can communicate, isnt that superluminal communication. regardless of how it came about, if i know something i didnt before because of it, its communication.
QED
BSD is for people who love UNIX. Linux is for those who hate Microsoft.
the whole concept of our linearity as a living being is simply impossible to prove, and i suppose a disappointing limit. the concept of teleportation of actual particles is an extremely difficult concept to consider. the method described here is simply deconstruction and reconstruction. you become disassembled into data, transferred, and reconstructed. however, it is my opinion that while an exact reconstruction, your linearity is interrupted. why? say you store this data, and 60 years later you die from old age and say in your will for someone to simply reconstruct you from your backup tape sitting in the safe deposit box... obviously it's a matter of opinion, but the reconstruction of your consciousness just isn't possible because the original can continue to exist/be destroyed along with the reconstruction thus branching the linearity of consciousness. How about this >> i'm obviously no expert, but how about through incredibly detailed analysis, we construct an antimatter field that is the exact opposite of your matter based state, then transfer the energy from the reaction, and somehow ... oh nevermind, my mind just exploded.
i say just take the bus.
What's so important about being able to teleport humans? I'd be more than happy with just being able to move all my shit around at the speed of light...
Teleportation is a key idea in large scale quantum computing schemes.
/. extensively.
Quantum computers work enormously faster than classical computers by performing computations on superpositions of states, effectively gaining huge parallelism. The hard part is that the computer must operate perfectly reversibly without decoherence of the memory states. This gets harder and harder as you scale up.
One scheme for making the computations more robust was proposed a couple of years ago. It involves a logical teleportation of a gate (not a physical gate, but a gate operation) after the most dispersive step. This enables multiple attempts at a calculation step to be performed, and then the teleportation of the gate post facto allows the successful operation to be used without repeating the calculation up to that point.
I know that sounds complicated, but hopefully that claim is a little less mysterious now.
The speed advantage has nothing to do with photons, and everything to do with quantum computation, which has been reviewed on
The hard thing about teleportation is that it is impossible to measure something perfectly due to Heisenberg's Uncertainty Principle. This means that you destroy half the information about something by measuring it even when you have infinitely good technology.
Teleporters use entanglement to disembody the information about the thing they are teleporting. Ideally, they have half of the information travelling classically (where it can be copied, if desired), but half of it travels as an entangled quantum state.
It is NOT a process of measure-copy-destroy, so all those cloning thoughts are not relevant. In fact, there is a well-known
Quantum No-cloning Theorem
which states that it is impossible to create an identical copy of a quantum state without simultaneously destroying the original. If you could, then you could measure different halves of the state of each, and you'd have cheated Heisenberg's Uncertainty Principle in a two-step process.
The particles can "communicate" faster than light, but humans cannot extract information from this communication.
There's no reason for a sig here.
Someone, somewhere, please wake me up when this evolves into a replicator that can make food. This will at least keep my grocery bill down.
Here's my real question: should this advance to the point where transporting a person is possible, who would want it? If you think about it, you are destroyed, transported, and recreated - while this all sound like great fun, why would I want to destroy myself? The person made on the other end may have all my memories, but they're not *me*, because *I* was destroyed to make the other person. They'll think they're me, but what good is that if I'm not there? I'll never live through it, so it's not *me* who's going to the impossibly far away place, so I guess it's kinda pointless, isn't it...
You are all fartheads.
Timespace is most likely discrete. There is a smallest meaningful interval of time, the Planck time. We can look at ourselves not as continuously moving through time, but as a set of states, each existing at a certain point in time. The illusion of time passing at each of these moments is created by having a memory consistent with the past states. This and more gems are to be found in this excellent paper: http://arxiv.org/PS_cache/quant-ph/pdf/0105/010509 7.pdf
"Politicians and diapers must be changed often, and for the same reason."
sure this may create super-whatever, but how much power is being taken up and is it worth it? If it could be possible to create a super computer, lets say i turn it on and all the lights in the state of california turn off. It might not be worth it.
Another thought -- it's very possible that location is a quantum effect, and "normal" movement is subatomic particles popping out of existence and reappearing a distance-quantum away. If that turns out to be the case, then what we call teleportation is the same thing as normal movement, just covering a larger distance with each jump.
Essentially, isn't this sending photons into the future as well as across space?
Entangled photon A and the laser photon are destroyed at one moment as information is collected. That information is sent at the speed of light, across space (which takes time) where it is used to tinker with photon B and turn it back into the laser photon that was disrupted by the scan. At this point, photon B is now in the exact same quantum state as the laser photon was a brief moment before when it was initially measured. If you just hold onto photon B and the information in the radio signal for a minute or an hour or whatever and then tinker with photon B, are you not essentially moving the laser forward in time without any real change in the photon?
Although potential teleportation (even of lasers) could have very 'good' applications in telecommunications or medical sciences, how far would a nation with military lasers (i.e U.S) go to ascertain the technology that could zap a Chemical Oxygen-Iodine Laser instantly to a target?