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arXiv quant-ph/0512236quant-ph
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噪声量子态的非经典性

Nonclassicality of noisy quantum states

A. A. Semenov, D. Yu. Vasylyev, B. I. Lev

摘要:

研究了与热浴相互作用的类蒸发器系统的非经典性条件。量子态的非经典性质只有在一定的温度阈值下才能保持。在这种情况下,热噪声的影响可以通过可观测量的变换来补偿,这测试了非经典性(见证函数)。讨论了基于非平衡零差的实验实现的可能性。同时,我们证明了该计划的基础上平衡零差不能改善噪声状态与建议的技术,应该直接应用。

英文摘要:

Nonclassicality conditions for an oscillator-like system interacting with a hot thermal bath are considered. Nonclassical properties of quantum states can be conserved up to a certain temperature threshold only. In this case, affection of the thermal noise can be compensated via transformation of an observable, which tests the nonclassicality (witness function). Possibilities for experimental implementations based on unbalanced homodyning are discussed. At the same time, we demonstrate that the scheme based on balanced homodyning cannot be improved for noisy states with proposed technique and should be applied directly.

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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