Wigner-function Evolution and Photon-number Decay of Quantum States in a Laser Cavity with the Kerr Medium

被引：0
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作者：
Meng-Yan Wu
Heng-Yun Lv
Ji-Suo Wang
Bao-Long Liang
Xiang-Guo Meng
机构：
[1] Liaocheng University,Shandong Provincial Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Engineerig
[2] Qufu Normal University,Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering
来源：
International Journal of Theoretical Physics | 2020年 / 59卷
关键词：
Laser cavity with Kerr medium; Thermal-entangled state representation; Infinitive operator-sum representation; Wigner-function evolution; Photon-number decay;
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摘要：
Using the thermal-entangled state representation theory, we solve the master equation describing a laser cavity with the Kerr medium, and find that the analytical evolution law of the density operator is governed by the infinitive Kraus operator-sum representation. Also, we obtain a new evolution formula of the Wigner function (WF) for any initial state in this cavity by rewriting the WF as a scalar product between two pure states. In term of the new WF formula, the WF evolution of the initial coherent and number states and the decay of photon number are also presented.
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页码：350 / 360
页数：10
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