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Decoherence and evolution of a general quadratic state for amplitude decay |
| Zhi-Long Wan(万志龙)1,†, Hong-Chun Yuan(袁洪春)1,2, Xiao-Lei Yin(尹晓蕾)1, and Chang-Ying Wang(王昌英)1 |
1 School of Sciences, Changzhou Institute of Technology, Changzhou 213032, China;
2 School of Electrical and Information Engineering, Changzhou Institute of Technology, Changzhou 213032, China |
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Abstract Making full use of the operator ordering method and the integration within ordered products, we obtain the analytical evolution law of a general quadratic state in the amplitude decay channel, and find that it is determined not only by the decay rate of the amplitude decay channel but also by the coefficients of the initial quadratic state. Further, the quantum statistical properties of the initial quadratic state for amplitude decay are investigated via its average photon number and photon-counting distribution, and its Wigner distribution function evolution is discussed in detail.
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Received: 03 May 2025
Revised: 24 June 2025
Accepted manuscript online: 03 July 2025
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PACS:
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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05.30.-d
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(Quantum statistical mechanics)
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42.50.Dv
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(Quantum state engineering and measurements)
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Corresponding Authors:
Zhi-Long Wan
E-mail: wanzl@czu.cn
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Cite this article:
Zhi-Long Wan(万志龙), Hong-Chun Yuan(袁洪春), Xiao-Lei Yin(尹晓蕾), and Chang-Ying Wang(王昌英) Decoherence and evolution of a general quadratic state for amplitude decay 2026 Chin. Phys. B 35 024204
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