Quantum Entanglement Dynamics of Two Atoms in Quantum Light Sources

Quantum Entanglement Dynamics of Two Atoms in

Quantum Light Sources

杨榕灿;李杰;王军民;张天才

【期刊名称】《理论物理通讯（英文版）》

【年(卷),期】2011(056)009

【摘要】Quantum entanglement dynamics of two Tavis Cummings atoms interacting with the quantum light sources in a cavity is investigated. The results show the phenomenon that the concurrence disappears abruptly in a finite time, which depends on the initial atomic states and the properties of squeezed states. We find that there are two decoherence- free states in squeezed vacuum fields; one is the singlet state, and the other entangled state is the state that combines both excited states and ground states with a relative phase being equal to the phase of the squeezed state.

【总页数】6页(429-434)

【关键词】量子纠缠;原子态;动力学;光源;压缩真空场;相互作用;压缩态;消相干【作者】杨榕灿;李杰;王军民;张天才

【作者单位】State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;School of Physics and Opto-Electronics T echnology, Fujian Normal University, Fuzhou 350007, China;State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-