The effect of atomic spontaneous decay on the dynamics of the negativity of the Wigner function of radiation

doi:10.1088/1674-1056/20/9/090303

摘要/Abstract

摘要： The exact solution of the master equation for the case of a high-Q cavity with atomic decay is found. We use the negativity of the Wigner function (WF) as an indicator of nonclassicality. It is found that the negative values of the field WF are very sensitive to any change in the damping parameter. The atomic spontaneous decay leads to the simultaneous disappearance of both entanglement and nonclassicality of quantum states. Moreover, the purity of the field states is completely lost.

Abstract: The exact solution of the master equation for the case of a high-Q cavity with atomic decay is found. We use the negativity of the Wigner function (WF) as an indicator of nonclassicality. It is found that the negative values of the field WF are very sensitive to any change in the damping parameter. The atomic spontaneous decay leads to the simultaneous disappearance of both entanglement and nonclassicality of quantum states. Moreover, the purity of the field states is completely lost.

Key words: non-classicality, entanglement, atomic decay

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps)

Abdel-Baset A. Mohamed. The effect of atomic spontaneous decay on the dynamics of the negativity of the Wigner function of radiation[J]. 中国物理B, 2011, 20(9): 90303-090303.

Abdel-Baset A. Mohamed . The effect of atomic spontaneous decay on the dynamics of the negativity of the Wigner function of radiation[J]. Chin. Phys. B, 2011, 20(9): 90303-090303.

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