论文标题
超速自旋损伤的费米气体中的无序结构
Disordered structures in ultracold spin-imbalanced Fermi gas
论文作者
论文摘要
我们研究了在低温下，在大量自旋极化中，自旋感染超速费米气体的性质。我们介绍了基于平均场和密度功能理论方法的微观计算结果，而没有对称性约束。在低极化值下，我们预测系统的结构是由几个自旋极化液滴组成的。随着极化的增加，系统会自组织成类似于液体晶体的无序结构，并且在能量上可以与有序结构（例如网格状域壁）竞争。在较高的极性化下，系统开始开发规律性，原则上可以称为超胚膜，其中周期密度调制和配对相关共存。在温度效应，维度和陷阱电位的存在方面，已经检查了结果的鲁棒性。还研究了动力稳定性。
We investigate properties of spin-imbalanced ultracold Fermi gas in a large range of spin polarizations at low temperatures. We present results of microscopic calculations based on mean-field and density functional theory approaches, with no symmetry constraints. At low polarization values we predict the structure of the system as consisting of several spin-polarized droplets. As the polarization increases, the system self-organizes into a disordered structures similar to liquid crystals, and energetically they can compete with ordered structures such as grid-like domain walls. At higher polarizations the system starts to develop regularities that, in principle, can be called supersolid, where periodic density modulation and pairing correlations coexist. The robustness of the results has been checked with respect to temperature effects, dimensionality, and the presence of a trapping potential. Dynamical stability has also been investigated.
