Using the adaptive time-dependent density matrix renormalization groupmethod, we numerically investigate the expansion dynamics of bosons in aone-dimensional hard-core boson model with three-body interactions. It is foundthat the bosons expand ballistically with weak interaction, which are obtainedby 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 aprominent result, the expansion velocity decreases with the enhancement ofthree-body interaction. We further study the dynamics of the system, whichquenches from the ground state with two-thirds filling, the results indicatethe expansion is also ballistic in the gapless phase regime. It could help usdetect the phase transition in the system.
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机译：利用自适应时变密度矩阵重新归一化群方法，我们数值研究了具有三体相互作用的一维硬核玻色子模型中玻色子的扩展动力学。发现玻色子以弱相互作用弹道扩张，这是通过局部密度和半径$ R_n $获得的。结果表明，从$ R_n = Vt $获得的膨胀速度$ V $取决于玻色子的数量。结果表明，随着三体相互作用的增强，膨胀速度减小。我们进一步研究了该系统的动力学，该动力学从基态以三分之二的填充猝灭，结果表明在无间隙相态下该膨胀也是弹道的。它可以帮助我们检测系统中的相变。
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