论文标题
在耗散浴中的fermi polaron与自旋轨道耦合
Fermi polaron in a dissipative bath with spin-orbit coupling
论文作者
论文摘要
我们研究了通过非辅助t-matrix方法浸入耗散性自旋轨道耦合的费米气体中的杂质的极化问题。我们首先提出了一种实验方案，以实现与耗散的旋转轨道耦合的费米浴，并表明可以通过非热汉密尔顿人来描述这种系统，该系统包含一个想象的自旋flip术语和假想的恒定移位项。我们发现非热性将改变浴气的单个颗粒分散体，并修改有吸引力和排斥的极性子的性能，例如能量，准粒子残基，有效的质量和衰减速率。我们还研究了与极性分子过渡的不稳定性相对应的无标准，这表明分子状态更具促进性，而淋浴耗散较强。最后，我们考虑使用有限的杂质密度的情况，并计算了极地之间的相互作用。我们的结果将北极星物理学的研究扩展到了非炎性系统，并且可以在未来的实验中实现。
We study the polaron problem of an impurity immersed in a dissipative spin-orbit coupled Fermi gas via a non-self-consistent T-matrix method. We first propose an experimental scheme to realize a spin-orbit coupled Fermi bath with dissipation, and show that such a system can be described by a non-Hermitian Hamiltonian that contains an imaginary spin-flip term and an imaginary constant shift term. We find that the non-Hermiticity will change the single particle dispersion of the bath gas, and modify the properties of attractive and repulsive polarons such as energy, quasi-particle residue, effective mass, and decay rate. We also investigate the Thouless criteria corresponding to the instability of the polaron molecule transition, which suggests a molecule state is more facilitated with stronger bath dissipation. Finally, we consider the case with finite impurity density and calculate the interaction between polarons. Our result extends the study of polaron physics to non-Hermitian systems and may be realized in future experiment.
