论文标题
液态气体过渡和与旋转扭曲的地面玻色子共存
Liquid-gas transition and coexistence in ground-state bosons with spin twist
论文作者
论文摘要
我们研究了在接触相互作用下的地面玻色子的热力学液体气体过渡和共存（LGTC）。我们发现，LGTC可以通过自旋极化的不匹配，被称为“自旋扭曲”，在单粒子和具有自由度自由度的玻色子的相互作用通道之间。这种旋转扭曲通过对低密度玻色子产生有效排斥来稳定气相，从而使LGTC在存在量子液滴的情况下以更大的密度实现。我们已经证明了二进制玻色子的方案，受到拉比耦合和磁性失调，在该方案中可以方便地调节液体气体过渡，并且它们的共存可以通过谐波陷阱中的不连续密度曲线来表征。 LGTC的自旋扭转方案可以推广到具有竞争单粒子和相互作用顺序的宽类量子系统。
We study the thermodynamic liquid-gas transition and coexistence (LGTC) for ground-state bosons under contact interactions. We find that the LGTC can be facilitated by the mismatch of spin polarization, dubbed "spin twist," between single-particle and interaction channels of bosons with spin degrees of freedom. Such a spin twist uniquely stabilizes the gas phase by creating an effective repulsion for low-density bosons, thereby enabling LGTC in the presence of a quantum droplet at a much larger density. We have demonstrated the scheme for binary bosons subject to Rabi coupling and magnetic detuning, where the liquid-gas transition can be conveniently tuned and their coexistence can be characterized by a discontinuous density profile in a harmonic trap. The spin twist scheme for LGTC can be generalized to a wide class of quantum systems with competing single-particle and interaction orders.
