一维无序 Bose-Hubbard 模型中的超流密度与准长程有序
无序系统与神经网络
2016-01-27 v2 量子物理
摘要
我们通过一种适用于具有周期边界条件系统的规范自适应树张量网络变分方法,研究一维无序 Bose-Hubbard 模型的平衡性质。我们计算了靠近超流到玻璃转变线的超流刚度和超流关联,获得了临界点的精确位置。通过研究关联幂律衰减指数的统计,我们确定了在强无序和弱相互作用区域(此前未经数值探索)中超流区域与玻色玻璃相之间的边界。在前一种情况下,我们的模拟与先前的蒙特卡洛计算结果一致。
引用
@article{arxiv.1510.01074,
title = {Superfluid density and quasi-long-range order in the one-dimensional disordered Bose-Hubbard model},
author = {Matthias Gerster and Matteo Rizzi and Ferdinand Tschirsich and Pietro Silvi and Rosario Fazio and Simone Montangero},
journal= {arXiv preprint arXiv:1510.01074},
year = {2016}
}
备注
18 pages, 12 figures; some references and two appendices added; appearing in New Journal of Physics focus issue "Strongly Interacting Quantum Gases in One Dimension"