The entanglement character between atoms in the nondegenerate two photons Tavis Cummings model
Abstract
The entanglement character including the socalled sudden death effect between atoms in the nondegenerate two photons TavisCummings model is studied by means of concurrence. The results show that the socalled sudden death effect occurs only for some kind of initial states. In other words, the phenomenon is sensitive to the initial conditions. One can expect the resurrection of the original entanglement to occur in a periodic way following each sudden death event. The length of the time interval for the zero entanglement is dependent on not only the degree of entanglement of the initial state but also the initial state. And the influence of dipoledipole interaction and different atomic initial states on entanglement between atoms are discussed. The sudden death effect can be weakened by the introducing of dipoledipole interaction.
 Publication:

Optics Communications
 Pub Date:
 July 2007
 DOI:
 10.1016/j.optcom.2007.03.022
 arXiv:
 arXiv:quantph/0703068
 Bibcode:
 2007OptCo.275..274Z
 Keywords:

 03.65.Yz;
 03.65.Ud;
 Decoherence;
 open systems;
 quantum statistical methods;
 Entanglement and quantum nonlocality;
 Quantum Physics
 EPrint:
 1tex and 2 eps figures. accepted by Optics Communications