Evolution of atom’s occupancy of two-atom system at mixed state in cavity QED

Abstract

Abstract:

The time evolution of atom’s occupation in a double Jaynes-Cummings model, where two atoms are in mixed state, was investigated by full quantum theory and numerical method, and the influences of atomic initial state and the mean photon numbers in cavity field on atom’s occupancy are discussed. The results show when the two cavities have the same photon numbers, evolution of atom’s occupation is only related to the purity r of atomic initial state and field intensity, but not influenced by initial entanglement; If the mean photon numbers in cavities are not equal, the evolution of atom’s occupation is not only related the purity r and field intensity, but also strongly influenced by two-atom initial entanglement.

Key words: quantum optics, atom’s occupancy, cavity QED, double Jaynes-Cummings model, generalized Werner state

CLC Number:

O431

MA Meijuan. Evolution of atom’s occupancy of two-atom system at mixed state in cavity QED[J]. J4, 2011, 28(4): 451-456.

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