Decoherence of elliptical states in phase space  

Decoherence of elliptical states in phase space

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作  者:王月媛 刘正君 廖庆洪 王继成 刘树田 

机构地区:[1]Department of Physics,Harbin Institute of Technology [2]Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province,School of Physics and Electronic Engineering,Harbin Normal University

出  处:《Chinese Physics B》2011年第5期6-11,共6页中国物理B(英文版)

基  金:Project supported by the National Basic Research Program of China (Grant No. 2011CB301801);the National Natural Science Foundation of China (Grant No. 10974039)

摘  要:The effects of decoherence on elliptical states which concern the quantum superposition of N coherent states on an ellipse in the a 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.The effects of decoherence on elliptical states which concern the quantum superposition of N coherent states on an ellipse in the a 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 decohercnce 

分 类 号:O431.2[机械工程—光学工程]

 

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