Thermal entanglement in molecular spin rings

• 来源期刊: 中国物理B（英文版）
• 关键词: thermal entanglement molecular spin ring concurrence
• 年，卷（期）: 2010,（11）
• 页码范围: 117-123
• 页数: 7页
• 语种: 英文

摘要

The thermal entanglement in the triangular molecular spin ring with Dzyaloshinskii-Moriya interaction is studied. The concurrences of arbitrary two spins of the triangular molecular spin ring for various cases are evaluated. The tendency of the concurrence with Dzyaloshiuskii-Moriya interaction and temperature is analysed and discussed. We note that the concurrence arrives at its maximum in the regime with the large Dzyaloshinekii-Moriya interaction and low temperature, and gradually decreases to zero with the increase of temperature. The concurrence has different features for the ferromagnetic and antiferromagnetic cases. For completenese, we also numerically calculate the concurrence of spin rings with N > 3 spins and analyse their behaviours.