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Hyper-Entangled Photons — 'Superdense' Coding Gets Denser

Posted by ScuttleMonkey on from the so-tangling-is-a-good-thing dept.

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."

3 of 72 comments (clear)

  1. 2 photons, not one? by inputdev · · Score: 2, Insightful

    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?

  2. WARNING! by Naughty+Bob · · Score: 3, Insightful

    The above link will shred your windows boxen, mod down a lot!

    --
    "Be light, stinging, insolent and melancholy"
  3. So SETI is focusing on the wrong thing? by ibsteve2u · · Score: 1, Insightful

    This bizarre coupling can link two photons, even if they are located on opposite sides of the galaxy.
    Should be looking for the other ends of linked proton pairs instead of monitoring the noise in the electromagnetic spectrum, eh?
    --
    Orwell: "In a Time of Universal Deceit, telling the Truth is a Revolutionary Act"