Dynamical fluctuations in open quantum systems, studied via unravelled dynamics

通过解开动力学研究开放量子系统中的动态涨落

• 批准号: 2602220
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2602220
• 关键词: Dynamical; fluctuations; open; quantum; systems

For quantum systems that interact with their environment, a common theoretical description is the Lindblad equation for the density matrix. However, for a full description of these systems -- including their dynamical fluctuations -- a more detailed description is required. One possibility is the unravelled dynamics, which is a stochastic process that captures the joint fluctuations of the system and its environment. Dynamical phenomena such as metastability have been studied through the Lindblad equation, but descriptions at the unravelled level are absent so far. This project will investigate the additional insights into the phenomena that are available by unravelling, and the relationships between Lindblad and unravelled descriptions.

对于与环境相互作用的量子系统，常见的理论描述是密度矩阵的 Lindblad 方程。然而，为了全面描述这些系统——包括它们的动态波动——需要更详细的描述。一种可能性是未阐明的动力学，它是一个捕获系统及其环境的联合波动的随机过程。诸如亚稳态之类的动力学现象已经通过林德布拉德方程进行了研究，但迄今为止还没有未阐明的水平的描述。该项目将研究通过解开所获得的现象的更多见解，以及 Lindblad 和解开的描述之间的关系。