标题： 量子跃迁方法在约瑟夫森结耦合到微观两能级系统开关过程中的应用 显示英文标题

标题： Quantum Jump Approach to Switching Process of a Josephson Junction Coupled to a Microscopic Two-Level System

摘要： 在微波辐射下，与微观两能级系统耦合的约瑟夫森结的开关电流在两个离散状态之间随机跳变。 我们使用通常用于量子光学中的量子跃迁方法对耦合系统的开关过程进行了建模。 讨论了影响宏观量子态之间量子跃迁特性的参数。 我们理论分析得到的结果与实验结果高度一致，并为耦合两能级系统的约瑟夫森结中的宏观量子跃迁提供了清晰的物理图景。 此外，量子跃迁可能作为一种有用的工具来研究固态系统中的微观两能级结构。 显示英文摘要

摘要： With microwave irradiation, the switching current of a Josephson junction coupled to a microscopic two-level system jumps randomly between two discrete states. We modeled the switching process of the coupled system with quantum jump approach that was generally used in quantum optics. The parameters that affect the character of the quantum jumps between macroscopic quantum states are discussed. The results obtained from our theoretical analysis agree well with those of the experiments and provide a clear physical picture for the macroscopic quantum jumps in Josephson junctions coupled with two-level systems. In addition, quantum jumps may serve as a useful tool to investigate the microscopic two-level structures in solid-state systems.