量子光学学报, 2014, 20 (1): 8, 网络出版: 2014-03-11
双模压缩热态经过分束器前后的纠缠变化
Entanglement Change of Two-mode Squeezed Thermal State before and after a Beam Splitter
双模压缩热态 Wigner函数 分束器 对数负值 Two-mode squeezed thermal state Wigner function beam splitter logarithmic negativity
摘要
本文采用对数负值来度量双模压缩热态通过分束器前后的纠缠属性的变化情况。结果表明, 当输入对称双模压缩热态, 无论如何调整分束器的相关参数, 纠缠不会发生变化; 而对于非对称双模压缩热态, 在适当选择的分束器参数范围内, 纠缠可能会发生变化。
Abstract
In this paper, we adopted logarithmic negativity to evaluate the entanglement properties of two-mode squeezed thermal state (TMSTS) before and after the beam splitter.It was found that when the input was symmetrical TMSTS, no matter how to adjust the relevant parameters of the beam splitter, entanglement did not change; for asymmetric TMSTS, entanglement may change in the appropriate range of the parameter of the beam splitter.
胡鹏, 王兰兰, 马善钧. 双模压缩热态经过分束器前后的纠缠变化[J]. 量子光学学报, 2014, 20(1): 8. HU Peng, WANG Lan-lan, MA Shan-jun. Entanglement Change of Two-mode Squeezed Thermal State before and after a Beam Splitter[J]. Acta Sinica Quantum Optica, 2014, 20(1): 8.
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