论文标题
昆多效应的淬灭动力学：跨杂质的传输耦合到相互作用的电线
Quench dynamics of the Kondo effect: transport across an impurity coupled to interacting wires
论文作者
论文摘要
我们研究了在量子淬灭之后，将磁杂质耦合到两个金属哈伯德链后的近托效应的实时动力学。使用有效的现场理论方法，我们发现对于非相互作用的电子，整个杂质的电荷电流由涉及近代时间的缩放函数给出。在相互作用的情况下，我们表明，随着排斥相互作用的强度和电流的时间依赖性，近托时间降低了，揭示了在Luttinger液体中近藤效应的特征。此外，我们验证了杂质磁化的松弛不会在近代时间以下的扰动状态中表现出普遍的缩放行为。我们的结果突出了非平衡动力学作为相互作用系统中量子杂质的有价值工具的作用。
We study the real-time dynamics of the Kondo effect after a quantum quench in which a magnetic impurity is coupled to two metallic Hubbard chains. Using an effective field theory approach, we find that for noninteracting electrons the charge current across the impurity is given by a scaling function that involves the Kondo time. In the interacting case, we show that the Kondo time decreases with the strength of the repulsive interaction and the time dependence of the current reveals signatures of the Kondo effect in a Luttinger liquid. In addition, we verify that the relaxation of the impurity magnetization does not exhibit universal scaling behavior in the perturbative regime below the Kondo time. Our results highlight the role of nonequilibrium dynamics as a valuable tool in the study of quantum impurities in interacting systems.
