论文标题
径向失效的费米气体中的径向fulde-ferrell-larkin-ovchinnikov州
Radial Fulde-Ferrell-Larkin-Ovchinnikov state in a population-imbalanced Fermi gas
论文作者
论文摘要
提出了在人口失衡的费米气体与涡流中的富尔德 - 弗雷尔 - 洛尔金 - 埃夫奇尼科夫（FFLO）状态的可能性。使用Bogoliubov-de-Gennes形式主义，我们自愿确定在存在涡流的情况下的超流体顺序参数和粒子数密度。我们发现，随着人口不平衡的增加，超流体顺序参数在径向方向上在涡流核心周围空间振荡，这表明FFLO态变得稳定。我们发现，与没有涡流的常规情况相反，radial fflo状态覆盖了弱耦合方案中$ t = 0 $的相位图的广泛区域。我们表明，这种不均匀的超流体可以被检测为与超流体阶参数的节点结构相关的局部极化速率的峰结构。由于在实验中已经实现了3D费米气体中具有人口不平衡的涡流，因此我们的提议是冷原子物理学中FFLO国家的有前途的候选人。
The possibility of a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state in a population imbalanced Fermi gas with a vortex is proposed. Employing the Bogoliubov-de-Gennes formalism we self-consistently determine the superfluid order parameter and the particle number density in the presence of a vortex. We find that as increasing population imbalance, the superfluid order parameter spatially oscillates around the vortex core in the radial direction, indicating that the FFLO state becomes stable. We find that the radial FFLO states cover a wide region of the phase diagram in the weak-coupling regime at $T=0$ in contrast to the conventional case without a vortex. We show that this inhomogeneous superfluidity can be detected as peak structures of the local polarization rate associated with the node structure of the superfluid order parameter. Since the vortex in the 3D Fermi gas with population imbalance has been already realized in experiments, our proposal is a promising candidate of the FFLO state in cold atom physics.
