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arXiv quant-ph/0701234quant-ph
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利用腔衰减提高原子态隐形传态的保真度

Improving fidelity in atomic state teleportation via cavity decay

Grzegorz Chimczak, Ryszard Tanaś

摘要:

本文针对Bose等人提出的原子态隐形传态方案,提出了一种改进的原子态隐形传态方案。83,5158(1999))。修改后的协议包括一个附加的阶段,其中在第一阶段期间失真的量子信息通过阻尼因子的补偿而完全恢复。该修改使得有可能获得比原始协议中所要求的差得多的腔的远距传送状态的高保真度,即,它们的衰变率可以大25倍以上。保真度的提高是以降低成功概率为代价的。我们表明,修改后的协议是强大的对暗计数。

英文摘要:

We propose a modified protocol of atomic state teleportation for the scheme proposed by Bose et al. (Phys. Rev. Lett. 83, 5158 (1999)). The modified protocol involves an additional stage in which quantum information distorted during the first stage is fully recovered by a compensation of the damping factor. The modification makes it possible to obtain a high fidelity of teleported state for cavities that are much worse than that required in the original protocol, i.e., their decay rates can be over 25 times larger. The improvement in the fidelity is possible at the expense of lowering the probability of success. We show that the modified protocol is robust against dark counts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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