Open-Destination Quantum Teleportation

Roland Piquepaille writes "An international team of physicists has entangled five photons for the first time in the world, reports Technology Research News in "Five photons linked." Why is this important? Because it's the minimum number of qubits needed for universal error correction in quantum computing. In other words, they found a way to check computational errors in future quantum computers. The physicists also demonstrated what they call 'open-destination teleportation,' a way to teleport quantum information within and between computers." "They teleported the unknown quantum state of a single photon onto a superposition of three photons. They were then able to read out this teleported state at any one of the three photons by performing a measurement on the other two photons," adds PhysicsWeb in "Entanglement breaks new record ". This will be used in about ten to twenty years to move information among quantum networks. You'll find more details and references in this overview."

Comments

oh please

[OwlofCreamCheese]

oh man... please stop... I dread reading the replys to this story... so so many people not understanding will come up. its not faster than light communication... I promise...

Re:oh please

[tylersoze]

Ugh, you're so right, here we go again. Individual photons, or any massless particle, travel at *exactly* the speed of light, no more, no less. When physicists speak of "slowing down" or "speeding up" light, they are referring to a type of *wave* velocity is which utterly different than the speed of the individual particles making up the wave, is *not* the speed at which information can be transmitted by the wave. There is also no way to transmit information faster than light with entanglement. In fact, in the transactional interpretation (just an "interpretation" mind you, it in no way predicts different effects than other interpreations) the information is transmitted exactly at c, but *back in time* with advanced waves. These are prime examples of complex, subtle subjects that are totally misunderstood by the lay person because of simplified analogies or terminology.