物理学报2017，Vol.66Issue(24)：22-31,10.DOI:10.7498/aps.66.240502
带有Dzyaloshinski-Mariya相互作用的两比特纠缠量子Otto热机和量子Stirling热机
Entangled quantum Otto and quantum Stirling heat engine based on two-spin systems with Dzyaloshinski-Moriya interaction
摘要
Abstract
Recently, the influences of the Dzyaloshinski-Moriya (DM) interaction on the performances of the basic thermo-dynamical quantities have attracted a lot of attention. A large number of investigations on the quantum coupling systems with DM interaction have been carried out. However, the specific effects of spin-orbit coupling with the performance on the quantum heat engine have not been taken into account in previous studies. DM interaction is a special kind spin-orbit coupling. To enrich the research of the quantum heat engines, the investigation about the effect of DM interaction on its thermodynamic characteristics should be included. In this study, we construct two entangled quantum engines based on spin-1/2 systems with different DM interactions, with the spin exchange constant and magnetic field fixed. The quantum Otto engine and the quantum Stirling engine are discussed in this article. By numerical calculation, we obtain the expressions for several thermodynamic quantities and plot the isoline maps of the variation of the basic thermodynamic quantities such as heat transfer, work with D1 and D2 and their efficiency in the two engines. The results indicate that the DM interaction plays an important role in the thermodynamic quantities for the quantum Otto engine and the quantum Stirling engine. In addition, the positive work condition is discussed with different DM interactions, with the spin exchange constant and magnetic field. Furthermore fixed, it is found that the efficiency of quantum Otto engine cycle is smaller than the Carnot efficiency while the quantum Stirling cycle can exceed the Carnot efficiency by using the regenerator. Finally, the second law of thermodynamics is shown to be valid in the two entangled quantum systems.关键词
量子热机/Dzyaloshinski-Mariya相互作用/效率Key words
quantum heat engine/Dzyaloshinski-Moriya interaction/efficiency引用本文复制引用
赵丽梅,张国锋..带有Dzyaloshinski-Mariya相互作用的两比特纠缠量子Otto热机和量子Stirling热机[J].物理学报,2017,66(24):22-31,10.基金项目
国家自然科学基金(批准号:11574022)资助的课题.Project supported by the National Natural Science Foundation of China (Grant No.11574022). （批准号:11574022）
