Coherent many-body dynamics between a quantum system and its environment

量子系统与其环境之间的相干多体动力学

• 批准号: 2458719
• 金额: --
• 依托单位: University of St Andrews
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2458719
• 关键词: Coherent; many; body; dynamics; between

Quantum physics is currently under transformation from its traditional role of fundamental understanding of matter to an active control tool for technological application. This requires on the basic science level the development of new tools and new understanding of previously marginal phenomena. A major component is that a quantum application requires driving by time dependent fields for both control and measurement. The environment in which a quantum system is embedded takes here an important role, often considered as an inhibitor of quantum information processing through decoherence. In this project we explore the possibility to include the environment as an active favourable player in quantum state manipulation. We build on previously acquired systematic method to include coherent fluctuations between the system and the environment, going past the usual Markov approximation. A special emphasis will be on the role of strong correlation physics in the coupled system's dynamics and the treatment of spatial and temporal coherence on the same footing. This will provide us with an understanding how to exploit the quantum nature of the environment itself and use it in a targeted way as a tool to achieve a quantum manipulation of the proper quantum system. As a special application the basic underpinning of magnetic resonance techniques could be re-examined, bringing the theoretical foundations of these important applications up to date with the tremendous experimental progress in low temperature physics and strong correlation physics that is bringing the current theoretical framework to its limits.

量子物理学目前正在从其对物质的基本理解的传统角色转变为技术应用的主动控制工具。这需要在基础科学层面上开发新工具以及对以前边缘现象的新理解。一个主要组成部分是量子应用需要由时间相关场驱动来进行控制和测量。量子系统嵌入的环境在这里发挥着重要作用，通常被认为是通过退相干进行量子信息处理的抑制剂。在这个项目中，我们探索将环境作为量子态操纵的积极有利参与者的可能性。我们以先前获得的系统方法为基础，将系统与环境之间的相干波动纳入其中，超越了通常的马尔可夫近似。特别强调强相关物理在耦合系统动力学中的作用以及在同一基础上处理空间和时间相干性。这将使我们了解如何利用环境本身的量子性质，并有针对性地将其用作实现适当量子系统的量子操纵的工具。作为一种特殊的应用，可以重新审视磁共振技术的基本基础，使这些重要应用的理论基础与低温物理学和强相关物理学的巨大实验进展保持同步，这些进展使当前的理论框架得以完善。限制。