论文标题
在二维准晶格中强烈相互交互的玻色子
Strongly-Interacting Bosons in a Two-Dimensional Quasicrystal Lattice
论文作者
论文摘要
准晶体表现出从远距离有序但却是整个结构的自相似性继承的异国特性。光学准晶格晶格的最新实现为研究在这种结构中相关的玻璃流体的研究铺平了道路，但是在理论上和实验上，强烈相互作用的状态在很大程度上尚未得到探索。在这里，我们确定了八倍的准晶体电势中二维相关玻色子的量子相图。使用大规模量子蒙特卡洛计算，我们证明了超氟玻璃的转变并确定临界线。此外，我们表明强烈的相互作用稳定了莫特绝缘子阶段，其中一些阶段自发折断了八倍的对称性。我们的结果与当前一代实验直接相关，尤其是在二维和异国情调的莫特阶段中观察到仍然难以捉摸的玻色玻璃相。
Quasicrystals exhibit exotic properties inherited from the self-similarity of their long-range ordered, yet aperiodic, structure. The recent realization of optical quasicrystal lattices paves the way to the study of correlated Bose fluids in such structures, but the regime of strong interactions remains largely unexplored, both theoretically and experimentally. Here, we determine the quantum phase diagram of two-dimensional correlated bosons in an eightfold quasicrystal potential. Using large-scale quantum Monte Carlo calculations, we demonstrate a superfluid-to-Bose glass transition and determine the critical line. Moreover, we show that strong interactions stabilize Mott insulator phases, some of which have spontaneously broken eightfold symmetry. Our results are directly relevant to current generation experiments and, in particular, drive prospects to the observation of the still elusive Bose glass phase in two dimensions and exotic Mott phases.
