Decoherence of elliptical states in phase space

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

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.

Keywords: elliptical states Wigner distribution function decoherence

Received: 21 October 2010
Revised: 20 November 2010
Accepted manuscript online:

PACS:	42.50.Dv	(Quantum state engineering and measurements)
	03.65.Yz	(Decoherence; open systems; quantum statistical methods)

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

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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 2011 Chin. Phys. B 20 054201

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