论文标题
标量玻色子和两个彩色费米的混合物在一个维
Mixture of scalar bosons and two-color fermions in one dimension: Superfluid-insulator transitions
论文作者
论文摘要
在Bose-Fermi-Hubbard模型的框架内研究了两色费米子和标量玻色子的一维混合物中的超氟 - 绝缘体转变。零温相图是用于排斥种内相互作用以及吸引或排斥的种间耦合的。除了微不足道的莫特绝缘体阶段，我们还报告了依赖于玻色子 - 弗斯特象相互作用的迹象的新的非平凡绝缘子阶段的出现。这些非平凡的绝缘体阶段满足条件$ρ_b\pmρ_f= n $和$ρ_B\ pm \ p \ tfrac {1} {2} {2}ρ_f= n $，带有plus（sinus）符号的rectulsive（sceptive）互动（有吸引力的）交互和$ n $ an $ n $ an in Integer。玻孔弗里术的相互作用远非费米尼的半填充，驱动了自旋部门中无间隙的过渡。我们的发现可以在最新的冷原子设置中实验观察到。
Superfluid-insulator transitions in a one-dimensional mixture of two-color fermions and scalar bosons are studied within the framework of the Bose-Fermi-Hubbard model. Zero-temperature phase diagrams are constructed for repulsive intraspecies interactions and attractive or repulsive interspecies couplings. In addition to the trivial Mott insulator phases, we report the emergence of new non-trivial insulator phases that depend on the sign of the boson-fermion interaction. These non-trivial insulator phases satisfy the conditions $ρ_B\pmρ_F=n$ and $ρ_B\pm \tfrac{1}{2}ρ_F=n$, with the plus (minus) sign for repulsive (attractive) interactions and $n$ an integer. Far from fermionic half-filling, the boson-fermion interaction drives a gapless-gapped transition in the spin sector. Our findings could be observed experimentally in state-of-the-art cold-atom setups.
