Quantum teleportation scheme by selecting one of multiple output ports

Details Quantum teleportation scheme by selecting one of multiple output ports Quantum teleportation scheme by selecting one of multiple output ports

2009-01-20

arxiv.org/abs/0901.2975v2

Phys. Rev. A 79, 042306 (2009)

Physics

Quantum Physics

14 pages, 4 figures

Scientific paper

10.1103/PhysRevA.79.042306

The scheme of quantum teleportation, where Bob has multiple (N) output ports and obtains the teleported state by simply selecting one of the N ports, is thoroughly studied. We consider both deterministic version and probabilistic version of the teleportation scheme aiming to teleport an unknown state of a qubit. Moreover, we consider two cases for each version: (i) the state employed for the teleportation is fixed to a maximally entangled state, and (ii) the state is also optimized as well as Alice's measurement. We analytically determine the optimal protocols for all the four cases, and show the corresponding optimal fidelity or optimal success probability. All these protocols can achieve the perfect teleportation in the asymptotic limit of $N\to\infty$. The entanglement properties of the teleportation scheme are also discussed.

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