Quantum entanglement in a two-dimensional ion trap

• 来源期刊: 中国物理（英文版）
• 关键词: trapped ion quantum entanglement reduced entropy relative entropy
• 年，卷（期）: 2003,（3）
• 页码范围: 287-293
• 页数: 7页
• 语种: 英文

摘要

In this paper, we investigate the quantum entanglement in a two-dimensional ion trap system. We discuss the quantum entanglement between the ion and phonons by using reduced entropy, and that between two degrees of freedom of the vibrational motion along x and y directions by using quantum relative entropy. We discuss also the influence of initial state of the system on the quantum entanglement and the relation between two entanglements in the trapped ion system.