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Chin. Phys. B, 2019, Vol. 28(11): 110301    DOI: 10.1088/1674-1056/ab457d
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Dynamical evolution of photon-added thermal state in thermal reservoir

Xue-Xiang Xu(徐学翔)1, Hong-Chun Yuan(袁洪春)2
1 College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;
2 School of Electrical and Information Engineering, Changzhou Institute of Technology, Changzhou 213032, China
Abstract  The dynamical behavior of a photon-added thermal state (PATS) in a thermal reservoir is investigated by virtue of Wigner function (WF) and Wigner logarithmic negativity (WLN), where this propagation model is abstracted as an input-output problem in a thermal-loss channel. The density operator of the output optical field at arbitrary time can be expressed in the integration form of the characteristics function of the input optical field. The exact analytical expression of WF is given, which is closely related to the Laguerre polynomial and is dependent on the evolution time and other interaction parameters (related with the initial field and the reservoir). Based on the WLN, we observe the dynamical evolution of the PATS in the thermal reservoir. It is shown that the thermal noise will make the PATS lose the non-Gaussianity.
Keywords:  quantum statistics      master equation      photon-added thermal state      thermal reservoir      Wigner logarithmic negativity  
Received:  03 August 2019      Revised:  04 September 2019      Published:  05 November 2019
PACS:  03.65.-w (Quantum mechanics)  
  05.30.-d (Quantum statistical mechanics)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11665013).
Corresponding Authors:  Xue-Xiang Xu, Hong-Chun Yuan     E-mail:  xuxuexiang@jxnu.edu.cn;yuanhc@czust.edu.cn

Cite this article: 

Xue-Xiang Xu(徐学翔), Hong-Chun Yuan(袁洪春) Dynamical evolution of photon-added thermal state in thermal reservoir 2019 Chin. Phys. B 28 110301

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