These 'people' (actually I'm not sure if they are people, I've certainly never been able to speak to a human there. I suspect it might be more of an evil artificial intelligence) are the worst. I have been trying to update an out of date email for an admin contact for months. Last time I faxed them official company letterheads, drivers licences, you name it and other than the automated email "we got your request" they maintain a stony silience and the domain info remains the same.
They are more evil than microsoft. I wish someone would declare a Jihad against them.
I wonder when they look at quantum computers using light
Quantum computers using photons is a good idea because photons are very well insulated from noise and decoherence, however it is a bitch to make them interact with each other for the same reason, so gates like controlled nots will be next to impossible to implement.
There is, however, a non-deterministic QC based on linear optics where multi-qubit work gates 1/16th of the time or something. I don't expect it will ever be useful for doing real computing though
I can't speak for other fields but powerpoint is becoming very popular in the physics community, and I have seen some damn good presentations done on it. Most of them done by people who have forgotten more about *nix than you'll ever know.
I would love to hear about alternatives, but right now powerpoint is the best presentation software I've seen and I have a win2000 partition especially for it.
Yes this is correct from the *local* perspective where measurement (b) takes place
But this is the only perspective we have. There is no observer which can have a perspective at both (a) and (b) without the transfer of information between the two.
There is a transfer of effect faster than light
Once again note that, in the absence of communication from (a), we can't detect any physical difference in our photon. The only way we can say an effect has occured is if we can detect one.
By the way, whats up with this auto-mod points for your posts?
25+ karma. Mostly from inane comments that got modded +5 funny. Gotta run, my email is [dawson at physics dot uq dot edu dot au] if you'd like to reply:)
This is false. If particle (a) has already been measured then the 50/50 probability disappears and
we are guaranteed that we will get the opposite spin of particle (a).
No, it isn't. In the absence of any communication from (a) we still have a 50% chance of getting an H, and a 50% chance of getting a V. We cannot detect any physical change in the photon, and not detecting any change is equivalent to there not being any change.
Look at it this way. If (a) had not told us anything about her measurement would you be willing to bet your entire fortune on the outcome of ours?
To make things a little more precise here lets suppose particles a and b are photons, and that we are measuring their spin polarisation which can be either horizontal H or vertical V.
If particle b is affected immediately upon collapse of particle a, then how has an action not occured?
Suppose we've got particle b and someone else on the other side of the solor system has particle a. If we measure our photon we are 50% likely to get an H, and 50% likely to get a V. This occurs whether or not (a) has measured their photon prior to us. In the absence of any communication from (a) we can determine no physical change in the photon whatsoever. Actions are something that effect physical changes and there are none here.
The EPR paradox is not a paradox at all. It does not require any resolution.
I just read the article because, like you, the 10^12 atoms bit sounded phenomenal.
From J Cirac's (a.ka. God) review:
The trick is to have a superposition of two states: one in which slightly more than half of the atoms in each sample are spin up and another one in which slightly more than half are spin down. If the environment interacts with one or more atoms and 'observes' that it is spin up, this is compatible with both states so the superposition is not destroyed but slightly damaged. As a result trillions of atoms must interact with the environment before the entanglement disappears
This is kinda similar to the way we can have robust superpositions from population differences in NMR.
Another interesting part of the experiment was that they managed to entangle two samples which were physically separated with a single light beam. This is the first time non local entanglement has been generated.
All in all, since most quantum experiments are hard because of the fragility of the phenomena in our experimental domain this looks very interesting.
Quantum entanglement's effect is basically the transfer of information at faster than light speeds (nonlocal).
This is just simply not true. There is no transfer of information faster than light and there is no action at a distance. To 'teleport' a quantum state requires the transmission of classical information over a radio, email, tin can and string or whatever. Without this classical transmission we would have no correlation between the states whatsoever.
When was the last time American's were dancing in the streets because some Palestians or Iraqi's died in an attack? Honestly, that's what has me the most sick. It's one thing for someone to be a terrorist and kill a few thousand people, it's even worse to be happy about it.
The footage you saw was shot in 1991 at the onset of the gulf war.
Take the guys who are supposed to go on trial this week (it's this week right) for the '93 bombing of the WTC and hang them right in front of the WTC remains. Send a message out to all terroists that we ain't fscking around.
I think it's unlikely that anyone who's prepared to fly a plane into a skyscraper is going to be deterred by a hanging.
I disagree that the issues are about those relevent to children. There are many parts in the books which are subtle comments on human behaviour, like the Dursley family and the spread of gossip.
And the first bit of Great Expectations was written from a child's perspective.
The question of whether physical constants have changed since the big bang is old news, sure, but observational evidence that they have is completely new, far newer than the outdated references that page mentions. Idiot.
Slashdot Mirror
Judging by your sig you hate anything but hamburgers and hot dogs. And most likely you have never been out of the good 'ol U.S of A.
More like a DNA transistor for how close it is to actually doing anything useful.
As I understand it Jihad roughly translates as "striving, struggle". I can strive and struggle against something.
Stupid anonymous know-it-all.
These 'people' (actually I'm not sure if they are people, I've certainly never been able to speak to a human there. I suspect it might be more of an evil artificial intelligence) are the worst. I have been trying to update an out of date email for an admin contact for months. Last time I faxed them official company letterheads, drivers licences, you name it and other than the automated email "we got your request" they maintain a stony silience and the domain info remains the same.
They are more evil than microsoft. I wish someone would declare a Jihad against them.
there's already a lot of talk about "Survivor." Junis predicts "Temptation Island" will be the number one show in Afghanistan within a month.
On the other hand, Linux users are probably a little more technical adept then I imagine the typical XP user will be.
I wonder when they look at quantum computers using light
Quantum computers using photons is a good idea because photons are very well insulated from noise and decoherence, however it is a bitch to make them interact with each other for the same reason, so gates like controlled nots will be next to impossible to implement.
There is, however, a non-deterministic QC based on linear optics where multi-qubit work gates 1/16th of the time or something. I don't expect it will ever be useful for doing real computing though
The paper is here.
I thought my girlfriend said she was going to the movies. There's no cinema there.
I can't speak for other fields but powerpoint is becoming very popular in the physics community, and I have seen some damn good presentations done on it. Most of them done by people who have forgotten more about *nix than you'll ever know.
I would love to hear about alternatives, but right now powerpoint is the best presentation software I've seen and I have a win2000 partition especially for it.
Yes. In the article it explicity mentions some sort of "Copy Protected CD" message when you try to record it onto a mini disc.
I'd love to see slashdot hosted on a 56K link out of Rob's bedroom.
Yes this is correct from the *local* perspective where measurement (b) takes place
:)
But this is the only perspective we have. There is no observer which can have a perspective at both (a) and (b) without the transfer of information between the two.
There is a transfer of effect faster than light
Once again note that, in the absence of communication from (a), we can't detect any physical difference in our photon. The only way we can say an effect has occured is if we can detect one.
By the way, whats up with this auto-mod points for your posts?
25+ karma. Mostly from inane comments that got modded +5 funny. Gotta run, my email is [dawson at physics dot uq dot edu dot au] if you'd like to reply
This is false. If particle (a) has already been measured then the 50/50 probability disappears and
we are guaranteed that we will get the opposite spin of particle (a).
No, it isn't. In the absence of any communication from (a) we still have a 50% chance of getting an H, and a 50% chance of getting a V. We cannot detect any physical change in the photon, and not detecting any change is equivalent to there not being any change.
Look at it this way. If (a) had not told us anything about her measurement would you be willing to bet your entire fortune on the outcome of ours?
To make things a little more precise here lets suppose particles a and b are photons, and that we are measuring their spin polarisation which can be either horizontal H or vertical V.
If particle b is affected immediately upon collapse of particle a, then how has an action not occured?
Suppose we've got particle b and someone else on the other side of the solor system has particle a. If we measure our photon we are 50% likely to get an H, and 50% likely to get a V. This occurs whether or not (a) has measured their photon prior to us. In the absence of any communication from (a) we can determine no physical change in the photon whatsoever. Actions are something that effect physical changes and there are none here.
The EPR paradox is not a paradox at all. It does not require any resolution.
I just read the article because, like you, the 10^12 atoms bit sounded phenomenal.
From J Cirac's (a.ka. God) review:
The trick is to have a superposition of two states: one in which slightly more than half of the atoms in each sample are spin up and another one in which slightly more than half are spin down. If the environment interacts with one or more atoms and 'observes' that it is spin up, this is compatible with both states so the superposition is not destroyed but slightly damaged. As a result trillions of atoms must interact with the environment before the entanglement disappears
This is kinda similar to the way we can have robust superpositions from population differences in NMR.
Another interesting part of the experiment was that they managed to entangle two samples which were physically separated with a single light beam. This is the first time non local entanglement has been generated.
All in all, since most quantum experiments are hard because of the fragility of the phenomena in our experimental domain this looks very interesting.
Quantum entanglement's effect is basically the transfer of information at faster than light speeds (nonlocal).
This is just simply not true. There is no transfer of information faster than light and there is no action at a distance. To 'teleport' a quantum state requires the transmission of classical information over a radio, email, tin can and string or whatever. Without this classical transmission we would have no correlation between the states whatsoever.
At least it's a level up from whining about other people's whining.
Voicing a concern is a valid form of participation.
A cop with an assault rifle would make me a lot less likely to try to hijack a plane than a rent-a-cop with a metal detector.
Oh yes, you want an assault rifle fired within a pressurised aircraft cabin. Great idea.
is this a reply to me? if so let me rephrase it so morons like you don't misunderstand:
"the footage shown on CNN of Palestinians celebrating the bombing of the WTC was shot in 1991 at the beginning of the gulf war."
Remarkable foresight they've got on the Gaza strip isn't it?
When was the last time American's were dancing in the streets because some Palestians or Iraqi's died in an attack? Honestly, that's what has me the most sick. It's one thing for someone to be a terrorist and kill a few thousand people, it's even worse to be happy about it.
The footage you saw was shot in 1991 at the onset of the gulf war.
Take the guys who are supposed to go on trial this week (it's this week right) for the '93 bombing of the WTC and hang them right in front of the WTC remains. Send a message out to all terroists that we ain't fscking around.
I think it's unlikely that anyone who's prepared to fly a plane into a skyscraper is going to be deterred by a hanging.
I disagree that the issues are about those relevent to children. There are many parts in the books which are subtle comments on human behaviour, like the Dursley family and the spread of gossip.
And the first bit of Great Expectations was written from a child's perspective.
Anyone? I imagine the easiest way would be to scan their proxy server logs, so don't use their proxy servers.
Mars doesn't have any atmosphere to speak of.
The question of whether physical constants have changed since the big bang is old news, sure, but observational evidence that they have is completely new, far newer than the outdated references that page mentions. Idiot.