论文标题
在有限温度下的偶极玻色子的交错量子阶段
Staggered quantum phases of dipolar bosons at finite temperatures
论文作者
论文摘要
带有相关隧道的扩展玻色 - 哈伯德模型表现出交错的超流体和超莫利量子相。我们使用Gutzwiller Mean-Field和量子蒙特卡洛方法研究了偶极玻色子的量子阶段的有限温度相变。当最近的邻居排斥与现场相互作用相当时，我们发现两个拓扑上不同的超流体被正常的流体相隔开，而在更强的异地相互作用时，密度调节的绝缘量子相。我们估计交错的超流体的临界温度对正常的流体过渡，并表明这种过渡是kosterlitz-无尽的类型。最后，我们在存在外部捕获电位的情况下阐明了交错的量子相的共存。我们的研究铺平了一种在最近的偶极光学晶格实验中观察新型交错量子相的方法。
The extended Bose-Hubbard model with correlated tunneling exhibits staggered superfluid and supersolid quantum phases. We study finite-temperature phase transitions of quantum phases of dipolar bosons in a two-dimensional optical lattice using Gutzwiller mean-field and quantum Monte Carlo approaches. When nearest-neighbor repulsion is comparable to the on-site interaction, we find that the two topologically distinct superfluids are separated by a normal fluid phase, while at stronger off-site interactions, density-modulated insulating quantum phases appear. We estimate the critical temperature of the staggered superfluid to normal fluid transition and show that this transition is of the Kosterlitz-Thouless type. Finally, we elucidate the coexistence of staggered quantum phases in the presence of an external trapping potential. Our study paves a way to observe novel staggered quantum phases in recent dipolar optical lattice experiments.
