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arXiv 0907.4817quant-ph
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加光子压缩热态的统计特性及其在光子损耗通道中的退相干

Photon--added squeezed thermal states: statistical properties and its decoherence in a photon-loss channel

Xue-xiang Xu, Li-yun Hu, Hong-yi Fan

摘要:

利用平均光子数为n的位移压缩热场的正序高斯形式,引入了加光子压缩热态(PASTS),并研究了它的统计性质,如Mandel的Q参数、数分布(以Legendre多项式表示)、Wigner函数等.然后,我们研究了它的消相干在光子损失通道的WF的负性的条款,通过推导的解析表达式的WF的PASTS。结果表明,对于任意的n和压缩参数r,加入单光子后的WF总是部分负的。

英文摘要:

Using the normally ordered Gaussian form of displaced-squeezed thermal field characteristic of average photon number n, we introduce the photon-added squeezed thermo state (PASTS) and investigate its statistical properties, such as Mandel's Q-parameter, number distribution (as a Legendre polynomial), the Wigner function. We then study its decoherence in a photon-loss channel in term of the negativity of WF by deriving the analytical expression of WF for PASTS. It is found that the WF with single photon-added is always partial negative for the arbitrary values of n and the squeezing parameter r.

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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