发表机构
Universität Heidelberg; RPTU University Kaiserslautern-Landau（海德堡大学; 凯泽斯劳滕-兰道技术大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究通过超冷原子混合物中相干驱动的重费米极化子，观测到拉比频率的幂律标度，验证了安德森正交性灾难在有限温度下的存在，并展示了相干驱动杂质作为量子多体探针的潜力。
AI 中文摘要
安德森正交性灾难（AOC）是一种典型的多体现象，其中局部扰动会引发费米海的宏观响应。我们通过在超冷$^6$Li-$^{133}$Cs混合物中相干驱动重费米极化子来探测AOC的特征。我们观察到测量的拉比频率对驱动强度呈幂律依赖，其指数与AOC预测一致。有限温度模拟定量重现了观测到的标度，表明AOC特征在理想化的零温度、无限质量极限之外仍然存在。拉比振荡的阻尼提供了极化子退相位的访问途径，并揭示了非单调的驱动依赖性，与当前理论定性一致。我们的结果确立了相干驱动的杂质作为通过局部相干控制探测量子多体动力学的通用探针。
英文摘要
The Anderson orthogonality catastrophe (AOC) is a paradigmatic many-body phenomenon in which a local perturbation induces a macroscopic response of a Fermi sea. We probe signatures of the AOC by coherently driving heavy Fermi polarons in an ultracold $^6$Li-$^{133}$Cs mixture. We observe a power-law dependence of the measured Rabi frequency on the drive strength, with exponents consistent with AOC predictions. Finite-temperature simulations quantitatively reproduce the observed scaling, indicating that AOC signatures persist beyond the idealized zero-temperature, infinite-mass limit. The damping of the Rabi oscillations provides access to polaron dephasing and reveals a nonmonotonic drive dependence, qualitatively consistent with current theories. Our results establish coherently driven impurities as a versatile probe of quantum many-body dynamics through local coherent control.
