论文标题
沮丧的Ising抗fiferromagnet中拓扑字符串的量子动力学
Quantum dynamics of topological strings in a frustrated Ising antiferromagnet
论文作者
论文摘要
我们通过大规模量子蒙特卡洛模拟和随机分析延续研究了三角形晶格上横向场模型的量子动力学。在弱横向场上，我们首次捕获与拓扑量子字符串相关的激发，该激发沿着字符串描述了XY链所描述的连续性特征，并符合垂直方向上的“ Luttinger String液体”。从拓扑字符串的角度可以很好地理解连续性特征。此外，我们从激发光谱中确定字符串的贡献。我们的研究为实验搜索与弦乐相关的激发提供了特征，并提出了一种新的理论方法，以查明实验光谱中的拓扑激发。
We investigate the quantum dynamics of the transverse field Ising model on the triangular lattice through large-scale quantum Monte Carlo simulations and stochastic analytic continuation. At weak transverse field, we capture for the first time the excitations related to topological quantum strings, which exhibits continuum features described by XY chain along the strings and those in accord with "Luttinger string liquid" in the perpendicular direction. The continuum features can be well understood from the perspective of topological strings. Furthermore, we identify the contribution of strings from the excitation spectrum. Our study provides characteristic features for the experimental search for string-related excitations and proposes a new theoretical method to pinpoint topological excitations in the experimental spectra.
