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arXiv quant-ph/0602071quant-ph
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光子附加相干辐射和热辐射的非经典性

Non-classicality of photon added coherent and thermal radiations

A. R. Usha Devi, R. Prabhu, M. S. Uma

摘要:

非高斯辐射场的产生和分析是近年来研究的热点。产生这种非高斯的最简单的方法是通过将光子加(减)到高斯场。有趣的是,当光子被添加到经典高斯场时,所得到的态表现出{ \em非经典性}。两种重要的经典高斯辐射场是相干态和热态。在这里,我们研究的非经典特性的状态时,光子添加到他们。这些态的非经典性表现在维格纳函数的负性上。我们还计算出了{ \em纠缠势},这是最近提出的一种衡量这些态的非经典性的方法。我们的分析表明,光子附加相干态是非经典的所有种子光束强度,其非经典性增加的光子数增加。当加入光子时,热态在所有温度下都表现出非经典性;温度越低,它们的非经典性越高。

英文摘要:

Production and analysis of non-Gaussian radiation fields has evinced a lot of attention recently. Simplest way of generating such non-Gaussians is through adding (subtracting) photons to Gaussian fields. Interestingly, when photons are added to classical Gaussian fields, the resulting states exhibit {\em non-classicality}. Two important classical Gaussian radiation fields are coherent and thermal states. Here, we study the non-classical features of such states when photons are added to them. Non-classicality of these states shows up in the negativity of the Wigner function. We also work out the {\em entanglement potential}, a recently proposed measure of non-classicality for these states. Our analysis reveals that photon added coherent states are non-classical for all seed beam intensities; their non-classicality increases with the addition of more number of photons. Thermal state exhibits non-classicality at all temperatures, when a photon is added; lower the temperature, higher is their non-classicality.

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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