非厄米安德森杂质模型中的关联与耗散
Correlation versus dissipation in a non-Hermitian Anderson impurity model
AI总结：
本文通过非厄米安德森杂质模型的slave-boson理论，揭示强关联重整化抑制单体损失并产生多体耗散，从而增强Kondo态寿命，并阐明耗散量子相变机制。
摘要：
我们通过为具有单体损失的 non-Hermitian Anderson 杂质模型发展 slave-boson 理论，分析了从 Kondo 区间到价涨落区间量子杂质系统中强关联与耗散之间的竞争。值得注意的是，在非厄米 Kondo 区间，强关联通过重整化效应定性地改变了耗散的本质，其中有效的单体损失被抑制，并产生了以复值杂化为特征的涌现多体耗散。我们基于这一重整化效应揭示了 Kondo 态耗散量子相变的机制，该效应反直觉地增强了杂质对抗损失的寿命。我们还发现了从非厄米 Kondo 区间到由单体耗散主导的价涨落区间的交叉。我们的结果可以在多种实验装置中得到验证，例如耦合到电子导线的量子点以及超冷费米气体中的量子点接触。
英文摘要：
We analyze the competition between strong correlations and dissipation in quantum impurity systems from the Kondo regime to the valence fluctuation regime by developing a slave-boson theory for a non-Hermitian Anderson impurity model with one-body loss. Notably, in the non-Hermitian Kondo regime, strong correlations qualitatively change the nature of dissipation through renormalization effects, where the effective one-body loss is suppressed and emergent many-body dissipation characterized by the complex-valued hybridization is generated. We unveil the mechanism of a dissipative quantum phase transition of the Kondo state on the basis of this renormalization effect, which counterintuitively enhances the lifetime of the impurity against loss. We also find a crossover from the non-Hermitian Kondo regime to the valence fluctuation regime dominated by one-body dissipation. Our results can be tested in a wide variety of setups such as quantum dots coupled to electronic leads and quantum point contacts in ultracold Fermi gases.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
