arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1203.0901cond-mat.quant-gascond-mat.stat-mech
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量子猝灭后广义Gibbs系综的构造

Constructing the generalized Gibbs ensemble after a quantum quench

Jean-Sébastien Caux, Robert M. Konik

摘要:

利用基于精确可解的非相对论理论的数值重整化群,研究了一维玻色气体(如Lieb-Liniger模型所描述的)从抛物阱中释放的非平衡动力学.我们的方法使我们能够跟踪后淬火动力学的气体一直到无限的时间。我们还展示了一个一般的建设,适用于所有的可积模型,已被建议管理这种动态的热力学系综,广义吉布斯系综。我们比较了使用我们的方法观察到的长时间动态从这个合奏平衡的预测。

英文摘要:

Using a numerical renormalization group based on exploiting an underlying exactly solvable non- relativistic theory, we study the out-of-equilibrium dynamics of a 1D Bose gas (as described by the Lieb-Liniger model) released from a parabolic trap. Our method allows us to track the post-quench dynamics of the gas all the way to infinite time. We also exhibit a general construction, applicable to all integrable models, of the thermodynamic ensemble that has been suggested to govern this dynamics, the generalized Gibbs ensemble. We compare the predictions of equilibration from this ensemble against the long time dynamics observed using our method.

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