论文标题
谐波振荡器，自旋1/2和两级热发动机系统中的量子动态和几何阶段
Quantum dynamic and geometric phases in harmonic oscillator, spin 1/2 and two-level thermal engines systems
论文作者
论文摘要
对于量子热发动机获得了动力相，其工作介质是单个谐波振荡器。该发动机的动力学是通过使用四个步骤在两个步骤中变化的四个步骤来获得的。在其他两个步骤中，热发动机也可以与冷热浴室耦合。在工作介质是自旋1/2系统的量子热发动机中获得了类似的动力阶段。分析了此类步骤在量子发动机中获得最大效率的时间的作用。研究了量子点中的电荷泵送动力，并研究了耦合到两个储层的量子点。分析了许多调制参数（包括其获得几何阶段的波动）的影响。由于热发动机中的单独步骤描述了非循环电路，因此我们建议使用一种特殊的方法来测量热发动机中的几何相位，用于非循环电路，这是规范不变的。
Dynamical phases are obtained for a quantum thermal engine, whose working medium is a single harmonic oscillator. The dynamics of this engine is obtained by using four steps where in two steps the time dependent frequency is changing. In the other two steps, the thermal engine is coupled alternatively to hot and cold heat baths. Similar dynamical phases are obtained in a quantum thermal engine whose working medium is spin 1/2 system. The role of times durations of such steps in the quantum engines for getting maximal efficiency is analyzed. The dynamic of charge pumping in a quantum dot coupled to two reservoirs is studied. The effects of many modulation parameters including their fluctuations for getting geometric phases are analyzed. Since the separate steps in thermal engines describe non-cyclic circuits, we propose to use a special method for measuring geometric phases in thermal engines for non-cyclic circuits which is gauge invariant.
