O teletransporte quântico de múltiplas propriedades de uma partícula quântica

quarta-feira, outubro 08, 2014

Quantum teleportation of multiple properties of a single quantum particle

Quantum teleportation provides a "disembodied" way to transfer quantum states of an object over arbitrarily long distance, without physical travelling of the object itself. A single quantum particle can possess various degrees of freedom-internal and external-and with coherent coupling among them. Yet, all the previous experiments were limited to teleportation of a single degree of freedom only. A fundamental open challenge is to simultaneously teleport multiple degrees of freedom which is necessary to fully describe an object, thereby truly teleporting it intactly. Here, we demonstrate the first quantum teleportation of both spin and orbital angular momentum of a single photon, in the form of spin-orbit hybrid entangled states. We use spin-orbit hyper-entangled photon pairs as quantum channel, and develop a new technique to discriminate hyper-entangled Bell state exploiting quantum non-demolition measurement. This work demonstrates an enhanced capability for quantum communications, and moves a step toward complete teleportation of complex quantum systems.
Comments:26 pages, 5 figures. Comments are welcome
Subjects:Quantum Physics (quant-ph); Strongly Correlated Electrons (cond-mat.str-el); Popular Physics (physics.pop-ph)
Cite as:arXiv:1409.7769 [quant-ph]
 (or arXiv:1409.7769v1 [quant-ph] for this version)

Submission history

From: Chao-Yang Lu [view email] 
[v1] Sat, 27 Sep 2014 06:09:53 GMT (570kb)