Entanglement and coherence of a three-level atom in Λ configuration interacting with two fields

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum entanglement coherence cavity QED
• 年，卷（期）: 2009,（6）
• 页码范围: 2288-2293
• 页数: 6页
• 语种: 英文

摘要

We investigate the entanglement of a three-level atom in A 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.