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- W428365412 abstract "Long distance atomic teleportation (LDAT) is of prime importance in long distance quantum communication. Scheme proposed by Bose et al. (1999) in principle enables us to have LDAT using cavity decay. However it gives message state dependent fidelity and success rate. Here, using interaction of entangled coherent states with atom–cavity systems and a two-step measurement, we show how, LDAT can be achieved with unit fidelity and as good success as desired under ideal conditions. The scheme is unique in that, the first measurement predicts success or failure. If success is predicted then second measurement gives perfect teleportation. If failure is predicted the message-qubit remains conserved therefore a second attempt may be started. We found that even in presence of decoherence due to dissipation of energy our scheme gives message state independent success rate and almost perfect teleportation in single attempt with mean fidelity of teleportation equal to 0.9 at long distances. However if first attempt fails, unlike ideal case where message-qubit remains conserved with unit fidelity, in presence of decoherence the message-qubit remains conserved to some degree, therefore mean fidelity of teleportation can be increased beyond 0.9 by repeating the process." @default.
- W428365412 created "2016-06-24" @default.
- W428365412 creator A5001424167 @default.
- W428365412 creator A5071380137 @default.
- W428365412 date "2015-09-01" @default.
- W428365412 modified "2023-09-30" @default.
- W428365412 title "Long distance atomic teleportation with as good success as desired" @default.
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- W428365412 doi "https://doi.org/10.1016/j.aop.2015.05.021" @default.
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