Squeezed vacuum state in lossy channel as a squeezed thermal state

被引：4
|
作者：
Yuan, Hong-Chun [1 ,2 ]
Xu, Xue-Xiang [3 ]
机构：
[1] Univ Shanghai Sci & Technol, Engn Res Ctr Opt Instrument & Syst, Shanghai 200093, Peoples R China
[2] Changzhou Inst Technol, Coll Optoelect Engn, Changzhou 213002, Peoples R China
[3] Jiangxi Normal Univ, Coll Phys & Commun Elect, Nanchang 330022, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2015年 / 29卷 / 33期
基金：
中国国家自然科学基金;
关键词：
Squeezed vacuum state; squeezed thermal state; Wigner function; lossy channel; STATISTICAL PROPERTIES; QUANTUM INTERFERENCE; FOCK; DECOHERENCE; OPERATORS;
D O I：
10.1142/S021798491550219X
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this paper, we alternatively study the evolution of squeezed vacuum state (SVS) in lossy channel by virtue of the phase space method. By using the formula of Wigner function (WF) in coherent representation and P representation of quantum density operator, the WF formula in lossy channel is derived. After obtaining the analytical expressions of the WFs of the lossy SVS and the squeezed thermal state (STS), we further prove the fact that the lossy SVS is equivalent to a kind of STS. Our result is useful in dealing with the light field transmission problems in the presence of losses.
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页数：7
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