Decoherence of elliptical states in phase space

doi:10.1088/1674-1056/20/5/054201

中国物理B ›› 2011, Vol. 20 ›› Issue (5): 54201-054201.doi: 10.1088/1674-1056/20/5/054201

Decoherence of elliptical states in phase space

刘正君¹, 廖庆洪¹, 王继成¹, 刘树田¹, 王月媛²

(1)Department of Physics, Harbin Institute of Technology, Harbin 150001, China; (2)Department of Physics, Harbin Institute of Technology, Harbin 150001, China;Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province,School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China

收稿日期:2010-10-21 修回日期:2010-11-20 出版日期:2011-05-15 发布日期:2011-05-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2011CB301801) and the National Natural Science Foundation of China (Grant No. 10974039).

Decoherence of elliptical states in phase space

Wang Yue-Yuan (王月媛)^ab, Liu Zheng-Jun (刘正君)^a, Liao Qing-Hong (廖庆洪)^a , Wang Ji-Cheng (王继成)^a , Liu Shu-Tian (刘树田)^a#br#

^a Department of Physics, Harbin Institute of Technology, Harbin 150001, China; ^b Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province,School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China

Received:2010-10-21 Revised:2010-11-20 Online:2011-05-15 Published:2011-05-15
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2011CB301801) and the National Natural Science Foundation of China (Grant No. 10974039).

摘要/Abstract

摘要： The effects of decoherence on elliptical states which concern the quantum superposition of N coherent states on an ellipse in the α plane are studied. The characteristic decoherence times are determined. The evolutions of the Wigner functions associated with these states are investigated theoretically and the losses of nonclassicality as a result of decoherence are discussed. The result shows that the decoherence of elliptical states is slower than circular states relying on the number of coherent states and the amplitude, and the constructed states have a higher resilience to losses.

关键词: elliptical states, Wigner distribution function, decoherence

Abstract: The effects of decoherence on elliptical states which concern the quantum superposition of N coherent states on an ellipse in the $\alpha$ plane are studied. The characteristic decoherence times are determined. The evolutions of the Wigner functions associated with these states are investigated theoretically and the losses of nonclassicality as a result of decoherence are discussed. The result shows that the decoherence of elliptical states is slower than circular states relying on the number of coherent states and the amplitude, and the constructed states have a higher resilience to losses.

Key words: elliptical states, Wigner distribution function, decoherence

中图分类号: (Quantum state engineering and measurements)

42.50.Dv

03.65.Yz (Decoherence; open systems; quantum statistical methods)

王月媛, 刘正君, 廖庆洪, 王继成, 刘树田. Decoherence of elliptical states in phase space[J]. 中国物理B, 2011, 20(5): 54201-054201.

Wang Yue-Yuan (王月媛), Liu Zheng-Jun (刘正君), Liao Qing-Hong (廖庆洪), Wang Ji-Cheng (王继成), Liu Shu-Tian (刘树田). Decoherence of elliptical states in phase space[J]. Chin. Phys. B, 2011, 20(5): 54201-054201.

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Decoherence of elliptical states in phase space

Decoherence of elliptical states in phase space

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