Quantum entanglement in the system of a moving V-type three-level atom interacting with the SU(1,1)-related coherent fields

• 来源期刊: 中国物理（英文版）
• 关键词: three-level atoms,SU(1,1)-related coherent fields,entanglement,reduced entropy,relative entropy
• 年，卷（期）: 2007,（5）
• 页码范围: 1344-1350
• 页数: 7页
• 语种: 英文

摘要

In a system with a moving V-type three-level atom interacting with the SU(1,1)-related coherent fields, we investigate the entanglement between the moving three-level atom and the SU(1,1)-related coherent fields by using the quantum-reduced entropy, and that between the SU(1,1)-related coherent fields by using the quantum relative entropy of entanglement. It is shown that the two kinds of entanglement are dependent on the atomic motion and exhibit the periodic evolution with a period of 2π/p. The maximal atom-field qutrit entanglement state can be prepared, and the entanglement preservation of the SU(1,1)-related coherent fields can be realized in the interacting process via the appropriate selection of system parameters and interaction time.