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arXiv quant-ph/0209168quant-ph
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相空间中的远程态制备和隐形传态

Remote state preparation and teleportation in phase space

Matteo G. A. Paris, Mary Cola, Rodolfo Bonifacio

摘要:

利用相空间中的维格纳函数分析了连续变量远程态的制备和隐形传态。我们提出了一个远程压缩态制备方案,其中一个光束的零差检测被用作另一个光束压缩的条件源。该方案也适用于噪声测量,并提供压缩,如果零差量子效率大于50%。相空间方法提供了一个方便的框架来描述隐形传态作为一个广义的条件测量,并评估相关的退化效应,如有限量的纠缠,沿线的损失,和非单位量子效率在发送位置。

英文摘要:

Continuous variable remote state preparation and teleportation are analyzed using Wigner functions in phase space. We suggest a remote squeezed state preparation scheme between two parties sharing an entangled twin beam, where homodyne detection on one beam is used as a conditional source of squeezing for the other beam. The scheme works also with noisy measurements, and provide squeezing if the homodyne quantum efficiency is larger than 50%. Phase space approach is shown to provide a convenient framework to describe teleportation as a generalized conditional measurement, and to evaluate relevant degrading effects, such the finite amount of entanglement, the losses along the line, and the nonunit quantum efficiency at the sender location.

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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