文章基本信息

标题：Expansion dynamics in a one-dimensional hard-core boson model with three-body interactions
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作者：Jie Ren ; Yin-Zhong Wu ; Xue-Fen Xu 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
期号：1
DOI：10.1038/srep14743
语种：English
出版社：Springer Nature
摘要：Using the adaptive time-dependent density matrix renormalization group method, we numerically investigate the expansion dynamics of bosons in a one-dimensional hard-core boson model with three-body interactions. It is found that the bosons expand ballistically with weak interaction, which are obtained by local density and the radius R _n. It is shown that the expansion velocity V , obtained from R _n = Vt , is dependent on the number of bosons. As a prominent result, the expansion velocity decreases with the enhancement of three-body interaction. We further study the dynamics of the system, which quenches from the ground state with two-thirds filling, the results indicate the expansion is also ballistic in the gapless phase regime. It could help us detect the phase transition in the system.