论文标题
$ p $ - 波统一限制附近的非热拓扑费费超氟
Non-Hermitian topological Fermi superfluid near the $p$-wave unitary limit
论文作者
论文摘要
从理论上讲，我们在$ p $ - 波菲斯巴赫共振附近的一维双分量的费米气体中讨论了非热的超氟相位过渡，并伴随着与偶性松弛相关的两体损失。我们第一次指出，该系统使我们有机会探索各种非平凡特性之间的相互作用，例如在$ p $ p $波散射长度，化学潜力消失的拓扑相过渡以及非省力的bardeen bardeen-cooper-cooper-schrieffer（bcs）上的替代品与bose-concenenstein concenensate（bece）condensifient in nightired，在BCS阶段，当特殊点出现在有效的非热汉密尔顿时分中时，损失诱导的超流体正常过渡发生。在BEC阶段，扩散的无间隙模式可以视为超流体状态不稳定性的前体。此外，我们表明超流体状态在拓扑相变点附近的两体损失上是脆弱的。
We theoretically discuss the non-Hermitian superfluid phase transition in one-dimensional two-component Fermi gases near the $p$-wave Feshbach resonance accompanied by the two-body loss associated with the dipolar relaxation. For the first time we point out that this system gives us an opportunity to explore the interplay among various non-trivial properties such as universal thermodynamics at divergent $p$-wave scattering length, topological phase transition at vanishing chemical potential, and non-Hermitian Bardeen-Cooper-Schrieffer(BCS) to Bose-Einstein condensate (BEC) transition, in a unified manner. In the BCS phase, the loss-induced superfluid-normal transition occurs when the exceptional point appears in the effective non-Hermitian Hamiltonian. In the BEC phase, the diffusive gapless mode can be regarded as a precursor of the instability of the superfluid state. Moreover, we show that the superfluid state is fragile against the two-body loss near the topological phase transition point.
