标题： 量子相干性对耦合到局域缺陷的淬火自由费米子的动力学和热力学的影响 显示英文标题

标题： Impact of quantum coherence on the dynamics and thermodynamics of quenched free fermions coupled to a localized defect

摘要： 我们研究了自由费米子在突然耦合到一维谐波陷阱中的局域缺陷时的非平衡量子动力学和热力学。 此设置实现了量子淬火变换，由于局域扰动导致系统波函数的正交化。 通过洛施密特回声和缺陷所做的功的基尔霍夫-狄拉克准概率（KDQ）分布，我们量化了正交化动力学的程度和速率。 特别是，我们表明将系统初始化为能级本征态的相干叠加会导致非经典特性，例如威格纳函数的负性以及功的KDQ分布的非正值性。 从简单的单粒子叠加开始，然后逐步推进到少体费米系统中的相干态和猫态，我们揭示了量子相干性和少体关联如何塑造由于缺陷存在而产生的非平衡响应。 显示英文摘要

摘要： We investigate the non-equilibrium quantum dynamics and thermodynamics of free fermions suddenly coupled to a localized defect in a one-dimensional harmonic trap. This setup realizes a quantum quench transformation that gives rise to the orthogonalization of the system's wave-function as an effect of the localized perturbation. Using the Loschmidt echo and the Kirkwood-Dirac quasiprobability (KDQ) distribution of the work done by the defect, we quantify the extent and rate of the orthogonalization dynamics. In particular, we show that initializing the system in a coherent superpositions of energy eigenstates leads to non-classical features, such as Wigner function's negativity and non-positivity of the work KDQ distribution. Starting from simple single-particle superpositions and then progressing with coherent and cat states of few-body fermionic systems, we uncover how quantum coherence and few-body correlations shape the out-of-equilibrium response due to the presence of the defect.