Abstract This paper studies the dynamics of nonlocality for a bosonic entangled coherent state in a phase damping model. The density operator of the system is solved by using a superoperator method. The dynamics of nonlocality for the bosonic entangled coherent state is uncovered by the Bell operator based on the pseudospin operator of a light field. The dynamics of the nonlocality for this state has also been studied by other Bell operators. The result of the numerical calculations of the Bell function shows that the quantum nonlocality heavily depends on the chosen Bell operator.
Received: 16 May 2008
Revised: 11 July 2008
Accepted manuscript online:
(Entanglement measures, witnesses, and other characterizations)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 60878001) and the
Natural Science Foundation of Shandong Province, China (Grant No
Y2006 A24).
Cite this article:
Lu Huai-Xin(逯怀新) and Li Ying-De(李英德) Dynamical nonlocality of the entangled coherent state in the phase damping model 2009 Chin. Phys. B 18 40
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