TheBlinQC

布林QC

• 批准号: EP/R043817/2
• 负责人: Florian Mintert
• 金额: $ 26.97万
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FR043817%2F2
• 关键词: TheBlinQC

Accurate control of complex quantum systems is of great importance for the development ofquantum technologies, as it permits to achieve many goals with high accuracy despite inherentsystem imperfections. Realising this in practice, however, is a great challenge, since it requiresprecise models and numerically expensive simulations.The central goal of this project is to develop and implement control techniques that do notrequire theoretical modelling, simulation or any knowledge of a systems' microscopicdecomposition. Instead, all necessary information will be obtained directly from the experiment.We will identify control targets that characterise desired properties of quantum systems well,and that can be estimated accurately and efficiently in an experiment. Based on theassessment of these targets and their dependence on tunable control parameters, we willdevelop control algorithms such that an optimal control protocol is found within a minimalnumber of experimental measurements.These methods will be developed in direct interplay between simulations of experiments withmany--body systems and actual experimental implementations. In simulations we will target thecreation and stabilisation of many--body localised states and time--crystalline structures, thatwill give evidence that the novel control techniques can cope with state--of--the--art quantummany--body problems. Experimentally we will consider the preparation of highly non--classicalstates of a levitated nano--sphere and the formation of large crystals of Rydberg atoms. Withan experiment on an extremely massive quantum object and an experiment with many,strongly interacting quantum systems, we will be able to experimentally achieve goals that areclearly out of reach with existing control techniques.Having verified the efficacy of the control techniques, we will develop a software package andmake it publicly available such that it finds broad application in the development of quantumtechnologies.

复杂量子系统的精确控制对于量子技术的发展具有重要意义，因为它允许在不考虑系统固有缺陷的情况下以高精度实现许多目标。然而，在实践中实现这一点是一个巨大的挑战，因为它需要精确的模型和昂贵的数值模拟。该项目的中心目标是开发和实施不需要理论建模、模拟或任何系统微观分解知识的控制技术。相反，所有必要的信息将直接从实验中获得，我们将确定控制目标，这些目标可以很好地满足量子系统的期望属性，并且可以在实验中准确有效地估计。基于对这些目标的评估及其对可调控制参数的依赖性，我们将开发控制算法，以便在最少数量的实验测量中找到最优控制协议，这些方法将在多体系统实验模拟和实际实验实施之间的直接相互作用中开发。在模拟中，我们的目标将是多体局域态和时间晶体结构的产生和稳定，这将证明新的控制技术可以科普最先进的量子多体问题。在实验上，我们将考虑制备悬浮纳米球的高度非经典态和形成里德伯原子的大晶体。通过对超大质量量子物体的实验和对许多强相互作用量子系统的实验，我们将能够在实验上实现现有控制技术显然无法实现的目标。在验证了控制技术的有效性之后，我们将开发一个软件包并将其公开，以便在量子技术的发展中找到广泛的应用。

项目成果

Limits on inference of gravitational entanglement

引力纠缠推断的局限性

• DOI: 10.1103/physrevresearch.4.013024
• 发表时间: 2022
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: Ma Y

Field-gradient measurement using a Stern-Gerlach atomic interferometer with butterfly geometry

• DOI: 10.1103/physreva.102.053321
• 发表时间: 2020-11
• 期刊: arXiv: Quantum Physics
• 作者: Changhun Oh;Hyukjoon Kwon;Liang Jiang;M. Kim

Quantum teleportation is a reversal of quantum measurement

• DOI: 10.1103/physrevresearch.3.033119
• 发表时间: 2021-04
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: Seung-Woo Lee;Dong-Gil Im;Yoon-Ho Kim;H. Nha;M. Kim

Controlled preparation of phases in two-dimensional time crystals

• DOI: 10.1103/physrevresearch.3.043203
• 发表时间: 2021-07
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: Arkadiusz Kuroś;R. Mukherjee;F. Mintert;K. Sacha

Bayesian Optimal Control of Greenberger-Horne-Zeilinger States in Rydberg Lattices.

• DOI: 10.1103/physrevlett.125.203603
• 发表时间: 2020-05
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: R. Mukherjee;Harry Xie;F. Mintert