Variable length universal entanglement concentration by local operations and its application to teleportation and dense coding

Details Variable length universal entanglement concentration by local operations and its application to teleportation and dense coding Variable length universal entanglement concentration by local operations and its application to teleportation and dense coding

2001-09-05

arxiv.org/abs/quant-ph/0109028v1

Physics

Quantum Physics

LaTeX 11 pages

Scientific paper

Using invariance of the $n$-th tensored state w.r.t. the $n$-th symmetric group, we propose a 'variable length' universal entanglement concentration without classical communication. Like variable length data compression, arbitrary unknown states are concentrated into perfect Bell states and not approximate Bell states and the number of Bell states obtained is equal to the optimal rate asymptotically with the probability 1. One of the point of our scheme is that we need no classical communication at all. Using this method, we can construct a universal teleportation and a universal dense coding.

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