基于量子反馈的非互易多体物理高效模拟
Efficient Simulation of Nonreciprocal Many-body Physics via Quantum Feedback
- University of Innsbruck（因斯布鲁克大学）
- Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences（奥地利科学院量子光学与量子信息研究所）
- Pritzker School of Molecular Engineering, University of Chicago（芝加哥大学普里茨克分子工程学院）
- Department of Physics, University of Chicago（芝加哥大学物理系）
- Zhejiang University（浙江大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
该研究提出基于量子反馈的非马尔可夫开放系统方案，可高效模拟非互易多体自旋模型，能获取稳态量、模拟猝灭动力学，且方案可实验实现、对缺陷鲁棒，为扩展非互易多体系统提供新途径。
AI中文摘要：
我们提出一种利用非马尔可夫开放系统高效模拟非互易多体自旋模型的方案。该方案采用单个量子发射器耦合至波导模式，该模式经时间延迟后反馈回同一发射器；借助这种相干延迟反馈，可构建出有效非互易相互作用，其中较早时刻的发射器会影响其较晚时刻的自身，从而形成可扩展的自旋链。我们表明，这类自旋模型的所有稳态量均可通过测量发射器及输出场获取。此外，利用可重置发射器的经典反馈，还可模拟任意乘积态的猝灭动力学。我们展示了非互易模型的显著特征，如刘维尔算符皮肤效应、异常弛豫动力学及输出光子的准长程有序。最后，我们证明该方案可实验实现且对缺陷具有鲁棒性。本工作为扩展非互易多体系统建立了可行途径，为生成奇异光态提供了新路径。
英文摘要：
We present a scheme to efficiently simulate nonreciprocal many-body spin models using a non-Markovian open system. Our scheme utilizes a single quantum emitter coupled to a waveguide mode that is fed back to the same emitter after a time delay. With this coherent delayed feedback, an effective nonreciprocal interaction can be engineered, wherein the emitter at earlier times affects itself at later times, creating a scalable spin chain. We show that all the steady-state quantities of such spin models can be accessed through measurement of the emitter and the output field. Furthermore, using classical feedback that resets the emitter, quench dynamics from arbitrary product states can be simulated. We demonstrate striking features of nonreciprocal models, such as the Liouvillian skin effect, anomalous relaxation dynamics, and quasi-long-range order of output photons. Finally, we show that the proposal is amenable to experimental realization and robust to imperfections. Our work establishes a feasible way to scale up a nonreciprocal many-body system, and provides a new route towards generation of exotic states of light.
