带有Dzyaloshinski-Mariya相互作用的两比特XXZ模型的纠缠量子热机  

Entangled quantum heat engines based on two-qubit XXZ model with Dzyaloshinski-Mariya interaction

作　　者：王涛[1] 黄晓理[1] 刘洋[1] 许欢[1] 

机构地区：[1]辽宁师范大学物理与电子技术学院,大连116029

出　　处：《物理学报》2013年第6期25-31,共7页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11105064)资助的课题~~

摘　　要：以带有Dzyaloshinski-Mariya相互作用的两比特XXZ模型为工作物质构建纠缠量子热机.在量子热力学平衡态下,采用Kieu的形式描述了做功与热传递.对于不同的各向异性参数,分析了热机循环中量子纠缠与热传递、做功以及机械效率等热力学量之间的关系.结果表明:在这个纠缠体系中,热力学第二定律依然成立;机械效率的等值线图是环状曲线;当各向异性参数较小时,热机在C1>C2和C1<C2两区域运行,当增大值时,热机只在C1>C2区域运行.We construct an entangled quantum heat engine based on two-coupled-qubit XXZ model with Dzyaloshinski-Mariya interaction. The work done and the heat transfer are discussed according to the definition first given by Kieu, The relations between the entanglement and heat transfer, work output and efficiency are analyzed for different anisotropic parameters. The results show that the second law of thermodynamics holds in entangled systems and the isolines for the efficiency are looped curves. When the anisotropic parameter Δ is small enough, the heat engine can operate in both C1 〉 C2 and C1〈 C2, however, when Δ is large, the heat engine operates in C1 〉 C2 only.

关 键 词：量子热机 并发度 机械效率 

分 类 号：O413.1[理学—理论物理]