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arXiv quant-ph/0309097quant-ph
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高斯噪声信道中的优化隐形传态

Optimized teleportation in Gaussian noisy channels

Stefano Olivares, Matteo G. A. Paris, Andrea R. Rossi

摘要:

研究了高斯量子噪声信道中的连续变量量子隐形传态,包括热噪声信道和压缩热噪声信道。我们首先研究了双光束的传输,并给出了双光束分离的阈值。我们发现,纯热通道的阈值总是大于挤压热的。另一方面,我们表明,压缩的通道提高了压缩态的隐形传态,特别是,我们找到了一类压缩态,更好地隐形传态在一个给定的噪声信道。最后,我们发现制度,优化隐形传态的压缩状态,提高幅度调制的通信相比,直接传输。

英文摘要:

We address continuous variable quantum teleportation in Gaussian quantum noisy channels, either thermal or squeezed-thermal. We first study the propagation of twin-beam and evaluate a threshold for its separability. We find that the threshold for purely thermal channels is always larger than for squeezed-thermal ones. On the other hand, we show that squeezing the channel improves teleportation of squeezed states and, in particular, we find the class of squeezed states that are better teleported in a given noisy channel. Finally, we find regimes where optimized teleportation of squeezed states improves amplitude-modulated communication in comparison with direct transmission.

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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