Chinese Journal of Quantum Electronics, Volume. 37, Issue 2, 215(2020)

Evolution of intensity- and time-dependent field quantum entropy of field-atom coupled system

Wangyun LIU1,*... Congyi PAN1, Zhiyong YANG2 and Cunli DUAN1 |Show fewer author(s)
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    Based on the Von Neumann quantum reduced entropy theory, the evolution properties of field quantum entropy in the interaction system of Λ-type three-level atom and single-model field are investigated when the coupling between the field and the atom changes with time and intensity under the on-resonance condition. The influences of the different initial fields and changes of the coupling coefficient on field quantum entropy is discussed in detail through numerical calculation. Results show that the different statistical properties of the initial fields will lead to the great variation of the field quantum entropy, and the changes of the coupling strength modulation function will change the oscillating frequency of the field quantum entropy evolution. In addition, it is shown that the initial stage of the interaction between the field and atom is a gradually coupled procedure, and the superposition state probability of the atom makes the field quantum entropy change periodically.

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    LIU Wangyun, PAN Congyi, YANG Zhiyong, DUAN Cunli. Evolution of intensity- and time-dependent field quantum entropy of field-atom coupled system[J]. Chinese Journal of Quantum Electronics, 2020, 37(2): 215

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    Paper Information

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    Received: Jul. 3, 2019

    Accepted: --

    Published Online: Apr. 3, 2020

    The Author Email: Wangyun LIU (312229964@qq.com)

    DOI:10.3969/j.issn.1007-5461. 2020.02.013

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