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arXiv 2402.02779cond-mat.quant-gasphysics.atom-ph
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耗散里德堡气体中多体稳态的手性切换

Chiral switching of many-body steady states in a dissipative Rydberg gas

Chongwu Xie, Konghao Sun, Kang-Da Wu, Chuan-Feng Li, Guang-Can Guo, Wei Yi, Guo-Yong Xiang

AI总结:

本文实验观测到耗散热里德堡蒸气中多体稳态的手性切换,揭示其源于参数空间中的奇异结构,并可通过微波和温度调控,展示了非厄米物理在多体开放系统中的应用。

摘要:

耗散里德堡气体是研究多体量子开放系统的杰出平台。尽管已有大量研究,但耗散里德堡气体的非平衡动力学很少从非厄米物理的角度被考察或利用,而非厄米性正是开放系统的固有属性。本文报道了在耗散热里德堡蒸气中观测到的多体稳态之间的手性切换现象,其中多体效应与非厄米性的相互作用起着关键作用。具体而言,当参数沿闭合回路绝热变化时,取决于参数调制的方向性(手性),里德堡蒸气可以在两个具有不同里德堡激发和光学透射率的集体稳态之间切换。采用平均场描述,我们揭示了双稳态的存在以及手性动力学均源于参数空间中的奇异结构,在该结构中多体李乌维尔超算符的多个稳态发生合并。我们证明了该奇异结构及其导致的状态切换动力学可通过微波缀饰和温度变化进行调控,从而确认了它们对里德堡蒸气多体耗散性质的依赖。

英文摘要:

Dissipative Rydberg gases are an outstanding platform for the investigation of many-body quantum open systems. Despite the wealth of existing studies, the non-equilibrium dynamics of dissipative Rydberg gases are rarely examined or harnessed from the perspective of non-Hermitian physics, which is but intrinsic to open systems. Here we report the experimental observation of a chiral switching between many-body steady states in a dissipative thermal Rydberg vapor, where the interplay of many-body effects and non-Hermiticity plays a key role. Specifically, as the parameters are adiabatically varied around a closed contour, depending on the chirality of the parameter modulation, the Rydberg vapor can change between two collective steady states with distinct Rydberg excitations and optical transmissions. Adopting a mean-field description, we reveal that both the existence of the bistable steady states and chiral dynamics derive from an exceptional structure in the parameter space, where multiple steady states of the many-body Liouvillian superoperator coalesce. We demonstrate that both the exceptional structure and the resulting state-switching dynamics are tunable through microwave dressing and temperature variations, confirming their reliance on the many-body dissipative nature of the Rydberg vapor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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