论文标题
二维光学晶格中偶极骨混合物的分离量子相
Segregated quantum phases of dipolar bosonic mixtures in two-dimensional optical lattices
论文作者
论文摘要
我们在二维光学晶格中鉴定出偶极玻色子的二元混合物中的量子相。我们的研究是由ER-DY的二元偶极冷凝物混合物的最新实验实现[Phys。莱特牧师。 121，213601（2018）]。我们通过使用扩展的两种物种玻色 - 哈伯德模型对系统进行建模，并使用平均场理论来计算基本相图。对于选定的案例，我们还使用场地截止的平均场理论获得了分析相边界。为了进行比较，我们还检查了两个物种玻色式模型的相图。我们的结果表明，具有远距离内部内部相互作用相的量子相分开而没有相排序。远程间隙相互作用的引入将修饰系统的量子阶段。它导致相位分离的量子相通过相排序出现。从相位分离的量子相的转变而没有相排列的相位有序的量子相破坏了反转对称性。
We identify the quantum phases in a binary mixture of dipolar bosons in two-dimensional optical lattices. Our study is motivated by the recent experimental realization of binary dipolar condensate mixtures of Er-Dy [Phys. Rev. Lett. 121, 213601 (2018)]. We model the system by using the extended two-species Bose-Hubbard model and calculate the ground-state phase diagrams by using mean-field theory. For selected cases we also obtain analytical phase boundaries by using the site-decoupled mean-field theory. For comparison we also examine the phase diagram of two-species Bose-Hubbard model. Our results show that the quantum phases with the long-range intraspecies interaction phase separate with no phase ordering. The introduction of the long-range interspecies interaction modifies the quantum phases of the system. It leads to the emergence of phase-separated quantum phases with phase ordering. The transition from the phase-separated quantum phases without phase ordering to phase ordered ones breaks the inversion symmetry.
