期刊论文

Wang, Chengzhi

英文

Optics Communications

0030-4018

2011

284

9

2393-2401

10.1016/j.optcom.2010.11.056

This work belongs to a project supported by the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No. 06B004 ), the Natural Science Foundation of Hunan Province, China (Grant Nos. 07JJ3123 and 09JJ5005 ), the Science and Technology Program of Hunan Province (Grant No. 2009FJ3072 ), and the Construct Program of the Key Discipline in Changsha University of Science and Technology .

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Classical correlation (CC), quantum discord (QD) and entanglement (QE) of two qubits in one-side and two-side decoherence models are investigated. The sudden change of quantum discord (DSC) as well as classical correlation and sudden death of entanglement (ESD) are found. It is proved that QE (QD) presents no sudden change (sudden death). We prove that, for nonzero occupation number of the reservoir, QE must suffer sudden death; For zero occupation number and X-form initial states, we obtain the states which are robust and the states which expe...