title: Expansion dynamics in a one-dimensional hard-core boson model with three-body interactions.
abstract: 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 Rn. It is shown that the expansion velocity V, obtained from Rn = 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.
authors.affiliation: Department of Physics and Jiangsu Laboratory of Advanced Functional Material, Changshu Institute of Technology, Changshu 215500, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ren
authors.affiliation: Department of Physics and Jiangsu Laboratory of Advanced Functional Material, Changshu Institute of Technology, Changshu 215500, China.|Department of Physics, School of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou, Jiangsu 215009, Peoples Republic of China.
authors.forename: Yin-Zhong
authors.initials: YZ
authors.lastname: Wu
authors.affiliation: Department of Fundamental Course, Wuxi Institute of Technology, Wuxi 214121, China.
authors.forename: Xue-Fen
authors.initials: XF
authors.lastname: Xu