J4 ›› 2011, Vol. 28 ›› Issue (4): 434-438.

• Quantum Optics • Previous Articles     Next Articles

Influence of detuning on entanglement evolution of cascade three-level atom in Kerr medium

WANG Jianrong,LAI Yunzhong,LI Kun   

  1. Department of Physics, Taiyuan University of Science and Technology , Taiyuan 030024,China
  • Received:2010-03-22 Revised:2010-10-26 Published:2011-07-28 Online:2011-07-06

Abstract:

The effects of optical field coherence parameter, modular photon number, Kerr medium coefficient and detuning on the entanglement evolution of cascade three-level atom in Kerr medium are studied based on quantum theory and methods of numerical calculation. The results shows that the entanglement between atoms is enhanced in stronger optical field and the entanglement is steadied by increasing the modular photon number. Kerr effect is remarkable in more photon number. With invariable Kerr medium , the increase of detuning will strengthen the entanglement strength, but this effect primary incarnates only on initial time of interacting.

Key words: quantum optics, cascade three-level atom, Kerr medium, detuning, quantum entanglement

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