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Population dynamics of excited atoms in non-Markovian environments at zero and finite temperature |
| Zou Hong-Mei (邹红梅), Fang Mao-Fa (方卯发) |
| Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of Education, College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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Abstract The population dynamics of a two-atom system, which is in two independent Lorentzian reservoirs or in two independent Ohmic reservoirs respectively, where the reservoirs are at zero temperature or finite temperature, is studied by using the time-convolutionless master-equation method. The influences of the characteristics and temperature of a non-Markovian environment on the population of the excited atoms are analyzed. We find that the population trapping of the excited atoms is related to the characteristics and the temperature of the non-Markovian environment. The results show that, at zero temperature, the two atoms can be effectively trapped in the excited state both in the Lorentzian reservoirs and in the Ohmic reservoirs. At finite temperature, the population of the excited atoms will quickly decay to a nonzero value.
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Received: 18 January 2015
Revised: 04 March 2015
Accepted manuscript online:
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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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42.50.Lc
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(Quantum fluctuations, quantum noise, and quantum jumps)
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42.50.Pq
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(Cavity quantum electrodynamics; micromasers)
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| Fund: Project supported by the Science and Technology Plan of Hunan Province, China (Grant No. 2010FJ3148) and the National Natural Science Foundation of China (Grant No. 11374096). |
Corresponding Authors:
Zou Hong-Mei
E-mail: zhmzc1997@126.com
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Cite this article:
Zou Hong-Mei (邹红梅), Fang Mao-Fa (方卯发) Population dynamics of excited atoms in non-Markovian environments at zero and finite temperature 2015 Chin. Phys. B 24 080304
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