中国物理B ›› 2009, Vol. 18 ›› Issue (6): 2288-2293.doi: 10.1088/1674-1056/18/6/029
张建松, 许晶波
Zhang Jian-Song(张建松) and Xu Jing-Bo(许晶波)†
摘要: We investigate the entanglement of a three-level atom in λ configuration interacting with two quantized field modes by using logarithmic negativity. Then, we study the relationship of the atomic coherence and the entanglement between two fields which are initially prepared in vacuum or thermal states. We find that if the two fields are prepared in thermal states, the atomic coherence can induce the entanglement between two thermal fields. However, there is no coherence-induced entanglement between two vacuum fields.
中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)