论文标题
浸入费米海的剂量杂质的诱导相互作用和淬灭动力学
Induced interactions and quench dynamics of bosonic impurities immersed in a Fermi sea
论文作者
论文摘要
我们通过施加杂质 - 中等相互作用强度的淬灭来阐明浸入一维费米子环境中的两个骨质杂质的基态特性和非平衡量子动力学。在基础状态下，杂质和费米海是分离的，对于强杂质中的排斥，它们在陷阱中心周围遇到了大型景点的定位趋势。我们证明了由宿主介导的有吸引力的诱导相互作用，用于符号的杂质 - 中耦合，并分析诱导和直接相互作用之间的竞争。在淬灭以排斥相互作用的情况下，触发了两个组件的呼吸运动，其相互作用的频率和振幅对于杂质而言，以及杂质及其周围的动力学分离，以使其具有强烈的排斥。对于有吸引力的淬火后耦合，由于其存在的存在，因此诱导相互作用的主要作用发生了跳动模式，这两个组件都显示了陷阱中心周围的本地化趋势。在这两种淬灭的情况下，有吸引力的诱导相关性在非相互作用的杂质之间表现出来，并且被发现仅在直接的杂质中占主导地位。
We unravel the ground state properties and the non-equilibrium quantum dynamics of two bosonic impurities immersed in an one-dimensional fermionic environment by applying a quench of the impurity-medium interaction strength. In the ground state, the impurities and the Fermi sea are phase-separated for strong impurity-medium repulsions while they experience a localization tendency around the trap center for large attractions. We demonstrate the presence of attractive induced interactions mediated by the host for impurity-medium couplings of either sign and analyze the competition between induced and direct interactions. Following a quench to repulsive interactions triggers a breathing motion in both components, with an interaction dependent frequency and amplitude for the impurities, and a dynamical phase-separation between the impurities and their surrounding for strong repulsions. For attractive post-quench couplings a beating pattern owing its existence to the dominant role of induced interactions takes place with both components showing a localization trend around the trap center. In both quench scenarios, attractive induced correlations are manifested between non-interacting impurities and are found to dominate the direct ones only for quenches to attractive couplings.
