近日，中国科学院理论物理研究所的石弢&易俗及其研究团队取得一项新进展。经过不懈努力，他们利用连续矩阵积态揭示准一维偶极气体中的量子相。相关研究成果已于2024年8月28日在国际知名学术期刊《物理评论A》上发表。

该研究团队利用连续矩阵乘积态技术研究了准一维偶极气体的基态性质。

通过一阶和二阶相关函数，研究人员发现根据卢廷格液体理论，该系统支持超流体、超Tonks-Girardeau和准晶体相。研究人员还绘制了由接触相互作用和偶极相互作用强度组成的参数平面上的相图。

此外，研究人员计算了该系统的卢廷格参数、结构因子和动量分布。最后，研究表明，预测的偶极效应有望在准一维极性分子气体中被观察到。

附：英文原文

Title: Unveiling quantum phases in quasi-one-dimensional dipolar gases using continuous matrix product states

Author: Li Peng, Junqiao Pan, Su Yi, Tao Shi

Issue&Volume: 2024/08/28

Abstract: We investigate the ground-state properties of the quasi-one-dimensional dipolar gases using continuous matrix product states techniques. Making use of the first- and second-order correlation functions, we find that the system supports the superfluid, super-Tonks-Girardeau, and quasicrystal phases according to the Luttinger liquid theory. We also map out the phase diagram on the parameter plane consisting the contact and dipolar interaction strengths. Furthermore, we compute the Luttinger parameter, the structure factor, and the momentum distribution of the system. Finally, we show that the predicted dipolar effect can potentially be observed in quasi-one-dimensional gases of polar molecules.

DOI: 10.1103/PhysRevA.110.023330

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.02333