论文标题
一维光学晶格中骨气混合物的量子液滴
Quantum droplets of bosonic mixtures in a one-dimensional optical lattice
论文作者
论文摘要
我们证明了两种成分的一维玻色扣链中存在量子液滴。如果它们通过可比的有吸引力的种间相互作用来平衡，这些液滴就存在于排斥性种内相互作用的任何强度。提出了地面相图，并通过检查密度曲线和偏离二元组和两体相关功能来表征不同的相位图。发现了各种各样的相位，包括原子超流体气体，原子超流体液滴，一对超氟液滴，一对超级流体气体和莫特 - 绝缘体相。确定了一个容易被探讨的参数区域，每个位点的平均种群低于三个原子，从而避免了三体损失。最后，发现液滴的两分纠缠对颗粒数量具有非平凡的依赖性。
We demonstrate the existence of quantum droplets in two-component one-dimensional Bose-Hubbard chains. The droplets exist for any strength of repulsive intra-species interactions provided they are balanced by comparable attractive inter-species interactions. The ground-state phase diagram is presented and the different phases are characterized by examining the density profile and off-diagonal one- and two-body correlation functions. A rich variety of phases is found, including atomic superfluid gases, atomic superfluid droplets, pair superfluid droplets, pair superfluid gases and a Mott-insulator phase. A parameter region prone to be experimentally explored is identified, where the average population per site is lower than three atoms, thus avoiding three-body losses. Finally, the bipartite entanglement of the droplets is found to have a non-trivial dependence on the number of particles.
