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Time-Evolution of Photon-Number Distribution and Density Operator of Squeezed Thermal State in the Thermal Environment

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Abstract

By virtue of the thermal entangled state representation, we analytically study time-dependent evolution of photon-number distribution and density operator of squeezed thermal state (STS) in the thermal environment. It is found that the initial density operator of STS still keeps squeezing and thermal within the thermal environment. At long times, such a state decays to thermal, a Gaussian classical state, as a result of decoherence. Moreover, the oscillations of photon-number distribution slowly disappear with increasing t, but the change of oscillations is completely different from that of STS in amplitude dissipative channel.

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Authors and Affiliations

  1. Department of Mechanical and Electronic Engineering, Chizhou University, Chizhou, Anhui, 247000, China

    Ye-Jun Xu

  2. School of Physical Science and Information Engineering, Liaocheng University, Liaocheng, 252059, China

    Xiang-Guo Meng

  3. Shandong Provincial Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng, 252059, China

    Xiang-Guo Meng

Authors
  1. Ye-Jun Xu
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  2. Xiang-Guo Meng
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Corresponding author

Correspondence to Xiang-Guo Meng.

Additional information

Special Fund for Theoretical Physics from the National Natural Science Foundation of China under grant 11247301, National Science Foundation for Young scholars of Anhui Province of China under grant 1208085QA14 and Scientific Research Foundation of Chizhou University under grant 2011RC027.

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Xu, YJ., Meng, XG. Time-Evolution of Photon-Number Distribution and Density Operator of Squeezed Thermal State in the Thermal Environment. Int J Theor Phys 52, 4155–4162 (2013). https://doi.org/10.1007/s10773-013-1728-7

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  • DOI: https://doi.org/10.1007/s10773-013-1728-7

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