Entropy of field interacting with two two-qubit atoms

• 来源期刊: 中国物理B（英文版）
• 关键词: quantum field entropy coherent state light field quantum entanglement
• 年，卷（期）: 2018,（9）
• 页码范围: 202-206
• 页数: 5页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/9/090303

摘要

We use quantum field entropy to measure the degree of entanglement for a coherent state light field interacting with two atoms that are initially in an arbitrary two-qubit state.The influence of different mean photon number of the coherent field on the entropy of the field is discussed in detail when the two atoms are initially in one superposition state of the Bell states.The results show that the mean photon number of the light field can regulate the quantum entanglement between the atoms and light field.