Computable measure of nonclassicality for light -: art. no. 173602
Computable measure of nonclassicality for light -: art. no. 173602
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DOI：
10.1103/physrevlett.94.173602
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发表时间：
2005-05-06
影响因子：
8.6
通讯作者：
Ritsch, H
中科院分区：
文献类型：
--
作者：
Asbóth, JK;Calsamiglia, J;Ritsch, H
我们提出用纠缠势(EP)来衡量单模电磁场量子态的非经典性质。它是利用线性光学、辅助经典态和理想光电探测器从光场中产生的双模纠缠量。EP可以检测非古典性，具有直接的物理解释，并且可以高效地进行计算。这三个性质加在一起使其从先前提出的非经典度量中脱颖而出。我们推导了重要状态类的EP的封闭表达式，并作为有耗信道中非经典退化的一个例子进行了分析。
We propose the entanglement potential (EP) as a measure of nonclassicality for quantum states of a single-mode electromagnetic field. It is the amount of two-mode entanglement that can be generated from the field using linear optics, auxiliary classical states, and ideal photodetectors. The EP detects nonclassicality, has a direct physical interpretation, and can be computed efficiently. These three properties together make it stand out from previously proposed nonclassicality measures. We derive closed expressions for the EP of important classes of states and analyze as an example of the degradation of nonclassicality in lossy channels.