Entanglement of two two-level atoms trapped in coupled cavities with a Kerr medium

N. H. Abdel-Wahab, T. A. S. Ibrahim, Magdy E. Amin

S. Abdel‐Khalek, Y. S. El-Saman, Mahmoud Abdel‐Aty

B. Mojaveri, Alireza Dehghani, M. A. Fasihi +1 more

Ji-Hui Teng, Hong‐Fu Wang, Lin-Na Qi +1 more

Qin Wu, Zhi‐Ming Zhang

In this paper, the entanglement dynamics of two two-level atoms trapped in coupled cavities with a Kerr medium is investigated. We find that the phenomena of entanglement sudden death (ESD) and entanglement sudden birth (ESB) appear during the evolution process. The influences of initial atomic states, Kerr medium, and cavity—cavity hopping rate on the atom—atom entanglement are discussed. The results obtained by the numerical method show that the atom—atom entanglement is strengthened and even prevented from ESD with increasing cavity—cavity hopping rate and Kerr nonlinearity.

Xiaoting Zhang, Ai‐Dong Zhu, Zhang Shou

We study the effect of Kerr medium on the intrinsic decoherence of a system which consists of two two-level atoms and a optical cavity. The entanglement of the system is calculated by making use of concurrence. Our results show that the intrinsic decoherence is very sensitive to the nonlinear coupling constant of Kerr medium. Both the oscillation period and the amplitude of the concurrence increase with the increasing nonlinear coupling constant.