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Hyper-Entangled Photons — 'Superdense' Coding Gets Denser
ScienceDaily is reporting that researchers at the University of Illinois have broken the record for most information sent via a single photon using the direction of "wiggling" and "twisting" a pair of entangled photons. "Using linear elements, however, the standard protocol is fundamentally limited to convey only one of three messages, or 1.58 bits. The new experiment surpasses that threshold by employing pairs of photons entangled in more ways than one (hyper-entangled). As a result, additional information can be sent and correctly decoded to achieve the full power of dense coding."
Great, now come and untangle my brain cells.
Sorry about this, but... People have been getting entangled by "wiggling" and "twisting" for a long time now.
Be Excellent To Each Other
I've seen my share of dense coding in my time as well.
I work in a college library and I can vouch that pairs of students who get hyperentangled in the study rooms or on one of our couches certainly seem to be capable of carrying much less information than non-entangled students.
"They then encode a message in the polarization state by applying birefringent phase shifts with a pair of liquid crystals." Just say you reversed the polarity! We've been waiting to hear it for decades now. Just come out and say it already! Enough of the cock teasing. This is science damn it, I want my compensator. I want to flux my capacitors!
"Don't feel bad for me child; I'm the monster that hides under your bed."
superdense
that's how i feel after reading that summary
1.58 bits?
wtf?
intellectual property law is philosophically incoherent. it is your moral duty to ignore it or sabotage it
Do not click.
Link contains shock site.
Shakespeare poems - infinite monkeys with infinite time.Computer tech support - a few trained ones working from 9 to 5.
If it takes an entangled pair to send 1.58 bits then it doesn't sound better than 1 bit per photon. Can anyone explain?
The above link will shred your windows boxen, mod down a lot!
"Be light, stinging, insolent and melancholy"
THAT i understood ;-)
:-P
now i only have have 36 more questions before i completely understand the story summary...
intellectual property law is philosophically incoherent. it is your moral duty to ignore it or sabotage it
The Nobel prize frequency needs to be updated. Once a year used to be fine but now they could give out a prize once a week and still have deserving people go unnoticed. I suppose in another decade they could be giving it out every day. Singularity here we come!
Shh.
First off, isn't this rehashed news from 2005?
Secondly, why did they have to change the word polarization to "wiggling"? As if lay people didn't know the word polarized from experience with their sunglasses.
Perhaps I'll concede that calling orbital angular momentum to "twisting" may be a reasonable twisting of the terminology, although in earlier papers they refer to "spiraling" or "cork-screw" which seems like a much better scientific-speak-transliteration to me...
This poster needs to be banned badly. He keeps posting malicious links.
Seems to me that angle isn't quantized. Therefore, the amount of information that one can encode on a single photon is only limited by our ability to encode and decode the angle at which a photon is traveling. Given the ability to measure the angle of a photon down to, oh, something on the order of 10e-34 radians or so, one should have no problem transmitting multiple yottabytes on a single photon.