Entanglement dynamics of two atoms successively passing a cavity

Qinghong Liao, Guangyu Fang, Muhammad Ashfaq Ahmad +1 more

Xue‐Qun Yan

Eugene K. Bashkirov, Michail S. Mastyugin

We investigated the dynamics of entanglement between atoms successively passing a cavity and interact with a thermal cavity field. We considered the situation when atoms are initially prepared in a pure entangled state. Using the exact solution of density matrix evolution we calculated the negativity for different values of cavity mean photon numbers. We shown the possibility to save the initial atomic entanglement even for a thermal cavity field with relatively high temperature.

Wen-Zhang Li, Chun‐Ling Zhang, Li-Tuo Shen +1 more

Chengzhi Wang, Chun-Xian Li, Jiangfan Li

Liao Qing-Hong, Liu Ye

The dynamics of entanglement of two atoms passing through a bimodal cavity one after another are investigated by employing the concurrence. The effects of the atomic coherence of the first atom and the initial entanglement of the cavity field on the time evolution of atom-atom entanglement are analyzed. The results show that the phenomenon of sudden birth of entanglement between two atoms occurs under some conditions and the maximum for the creation of the entanglement is dependent on the initial entanglement of the cavity field. Moreover, the threshold time and maximum for the creation of the entanglement can be controlled by changing the amplitude of atom. We find that the proposal may provide us with a theoretical way to control and manipulate the entanglement.