J4 ›› 2011, Vol. 28 ›› Issue (6): 699-704.

• Quantum Optics • Previous Articles     Next Articles

Entropy properties of  coupled identical V-type three-level atoms interacting with vacuum field in cavity filled with Kerr-like medium

LI Ke, LING Wei-jun, WANG Zhi-jian   

  1. Department of Physics, Tianshui Normal University, Tianshui 741001, China
  • Received:2010-10-19 Revised:2011-08-08 Published:2011-11-28 Online:2011-11-14

Abstract:

The entropy properties of the field in the system of coupled identical V-type three-level atoms interacting with vacuum field in cavity filled with Kerr-like medium are studied by means of quantum theory. The time evolution of the entropy of the field via the initial state of the atomic system、coupling coefficient between the atoms and the Kerr coefficient are discussed. Numerical calculation results show: When the ground state and the excited state of the atoms are in appropriate superpositions state, the entropy of the field is behaving periodic oscillation. The oscillate frequency and amplitude are depending on the coupling constant between atoms and the third-order nonlinear coefficient of Kerr-like medium. Therefore, the entropy of the field is very sensitive to the atomic initial state.

Key words: quantum optics, entropy, coupled V-type three-level atoms, kerr-like medium

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