耗散诱导的多体腔量子电动力学中的Sachdev-Ye-Kitaev物理
Dissipation-induced Sachdev-Ye-Kitaev physics in many-body cavity quantum electrodynamics
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中文总结 AI 辅助
该研究证明腔QED器件可实现耗散SYK物理，通过单模腔原子自发辐射和多模腔光子泄漏两条路径，从不同闭系统极限收敛到相同非厄米随机矩阵普适类，其混沌特征可通过单原子分辨密度观测。
中文摘要 AI 辅助
我们证明，腔量子电动力学（QED）器件可实现耗散型Sachdev-Ye-Kitaev（SYK）物理，这是开放多体系统中量子混沌的典型场景。具有无序全对腔介导相互作用的超冷费米子提供了两条互补路径：单模腔中的原子自发辐射，以及多模腔中的光子泄漏。值得注意的是，尽管二者分别源自可积和混沌的闭系统极限，却都收敛到相同的非厄米随机矩阵普适类。在单模情形下，耗散因此从可积哈密顿量中产生量子混沌。我们将这种收敛归因于耗散秩的可调增长，该增长分别由Lamb-Dicke参数和腔模间距控制。由此产生的混沌留下了动力学指纹：从长寿命的预热记忆到快速热化的交叉，可在单原子分辨密度中观测到。
英文摘要
We show that cavity quantum electrodynamics (QED) devices can realize dissipative Sachdev-Ye-Kitaev (SYK) universality, a paradigmatic setting for quantum chaos in open many-body systems. Ultracold fermions with disordered, all-to-all cavity-mediated interactions provide two complementary routes: atomic spontaneous emission in a single-mode cavity and photon leakage from a multimode cavity. Strikingly, both converge to the same non-Hermitian random-matrix universality despite originating from integrable and chaotic closed-system limits, respectively. In the single-mode cavity, dissipation creates quantum chaos from an integrable Hamiltonian. We trace this convergence to a tunable growth in dissipative rank, controlled, respectively, by the Lamb-Dicke parameter and the cavity-mode spacing. The integrability-to-chaos crossover is accompanied by a dynamical crossover from long-lived prethermal memory to rapid thermalization, visible in single-atom-resolved densities.
发表机构
- École Polytechnique Fédérale de Lausanne (EPFL)（洛桑联邦理工学院）
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