Non-equilibrium dynamics of long-range interacting quantum systems and their applications to quantum metrology

长程相互作用量子系统的非平衡动力学及其在量子计量中的应用

基本信息

项目摘要

Quantum metrology uses quantum effects such as interference, entanglement, or very generally non-classical quantum states to increase the sensitivity of the measurement of physical quantities. Interactions play a central role, as on the one hand they are needed to create the non-classical states, and on the other hand they can be measured themselves with a precision that scales favorably with the number of particles. The project aims at this second, so far little explored possibility and will investigate different non-equilibrium states in dynamically driven open quantum systems with long-range interactions and explore their usefulness for quantum metrology.Theoretically, we will study adiabatic and non-adiabatic (quenched) dynamics of the interacting many-body systems and examine their utility for increasing the sensitivity of measurements of external parameters, such as electromagnetic fields. We will elucidate the role of underlying phase-space structures for the sensitivity and develop and implement efficient quantum algorithms for simulating open complex quantum systems. Experimentally, we will employ two-dimensional clouds of cold trapped atoms coupled by resonant lasers to the highly excited Rydberg states in the presence of controlled electric fields. Small and fast changes of the electrical field permit dynamical tuning of the corresponding long-range dipole-dipole interaction strength. This will allow us to realise different kinds of dynamical driving schemes and to tune the relaxation and ionisation rates. Using an ion microscope with high spatiotemporal resolution, we will perform precise measurements of the spatial and temporal dynamics and correlations in this driven interacting quantum system. A proof-of-principle experiment for measuring the electric field with long-range interacting Rydberg atoms will be performed.
量子计量学利用量子效应,如干涉、纠缠或非常普遍的非经典量子态来增加物理量测量的灵敏度。相互作用起着核心作用,因为一方面它们是创造非经典状态所必需的,另一方面它们可以被精确地测量,并与粒子的数量成比例。该项目旨在第二种,迄今为止很少探索的可能性,并将研究具有远程相互作用的动态驱动开放量子系统中的不同非平衡状态,并探索它们对量子计量的有用性。从理论上讲,我们将研究相互作用的多体系统的绝热和非绝热(淬灭)动力学,并检查它们在提高外部参数(如电磁场)测量灵敏度方面的效用。我们将阐明底层相空间结构对灵敏度的作用,并开发和实现有效的量子算法来模拟开放的复杂量子系统。实验上,我们将在受控电场的存在下,利用共振激光耦合冷阱原子的二维云到高度激发的里德堡态。电场的小而快的变化使得相应的远距离偶极-偶极相互作用强度的动态调谐成为可能。这将使我们能够实现不同类型的动态驱动方案,并调整弛豫和电离速率。使用具有高时空分辨率的离子显微镜,我们将在这个驱动的相互作用量子系统中进行时空动力学和相关性的精确测量。一个原理证明实验测量电场与远距离相互作用的里德伯原子将进行。

项目成果

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Professor Dr. Daniel Braun其他文献

Professor Dr. Daniel Braun的其他文献

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{{ truncateString('Professor Dr. Daniel Braun', 18)}}的其他基金

Towards local measurements of space-time geometries with optical clocks
利用光学时钟对时空几何进行局部测量
  • 批准号:
    436207576
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
High-resolution imaging with multi-parameter quantum metrology
多参数量子计量高分辨率成像
  • 批准号:
    423415383
  • 财政年份:
    2019
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Dynamics in quantum metrology
量子计量动力学
  • 批准号:
    312936166
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似国自然基金

最优证券设计及完善中国资本市场的路径选择
  • 批准号:
    70873012
  • 批准年份:
    2008
  • 资助金额:
    27.0 万元
  • 项目类别:
    面上项目

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