论文标题
在随机跳跃玻色 - 哈伯德模型中超级阶段的出现
Emergence of a superglass phase in the random hopping Bose-Hubbard model
论文作者
论文摘要
我们研究了一个与随机跳的实验可行的系统，该系统是由随机跳跃的，由晶格上的无限范围玻色 - 哈伯德模型描述，其跳跃积分由高斯分布的独立随机变量（具有非零平均值）给出。我们采用副本法和猪尾公式以热力学极限解决了这种量子模型。我们发现并描述了一个超级阶段，该相位出现在玻璃和超流体相之间的界面。超级玻璃和远程顺序都存在于超级玻璃，并相互竞争，如其订单参数的反相关所揭示的。我们在系统参数的多维空间的各个横截面中介绍相图。在选定的参数子空间中，我们将结果与曾经庆祝的旋转玻璃系统的非隔离，对角线排序且曾经闻名的结果进行了比较。
We study an experimentally feasible system of strongly correlated bosons with random hoppings, described by the infinite-range Bose-Hubbard model on a lattice with hopping integrals given by independent random variables of Gaussian distribution with non-zero mean. We solve this quantum model in the thermodynamic limit, employing the replica method and the Trotter-Suzuki formula. We find and describe a superglass phase that emerges at the interface between glass and superfluid phases. Both glassy and long-range orderings are present in the superglass and compete with each other, as revealed by the anticorrelation of their order parameters. We present phase diagrams in various cross-sections of the multidimensional space of system parameters. In selected parameter subspaces, we compare the results to those of non-disordered, diagonally-disordered, and once celebrated spin-glass systems.
