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arXiv 1006.3741cond-mat.str-elcond-mat.stat-mech
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量子可积系统中的几何猝灭

Geometric quenches in quantum integrable systems

Jorn Mossel, Guillaume Palacios, Jean-Sébastien Caux

摘要:

我们考虑突然改变可积的一维多体量子系统的几何形状的一般问题。我们展示了如何释放到一个更大的系统中的初始量子态的物理可以完全描述的代数贝特Anglor的框架内,通过提供这样的几何淬火后的系统的本征态的基础的初始状态的精确分解。我们的结果,适用于一个大类的模型,包括Lieb-Liniger气体和海森堡自旋链,从而提供了一个可靠的框架,在这种非平衡状态下的时间依赖的期望值和相关性的计算。

英文摘要:

We consider the generic problem of suddenly changing the geometry of an integrable, one-dimensional many-body quantum system. We show how the physics of an initial quantum state released into a bigger system can be completely described within the framework of the Algebraic Bethe Ansatz, by providing an exact decomposition of the initial state into the eigenstate basis of the system after such a geometric quench. Our results, applicable to a large class of models including the Lieb-Liniger gas and Heisenberg spin chains, thus offer a reliable framework for the calculation of time-dependent expectation values and correlations in this nonequilibrium situation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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