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arXiv 1003.5170cond-mat.quant-gas
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Luttinger模型的量子猝灭动力学

Quantum quench dynamics of the Luttinger model

A. Iucci, M. A. Cazalilla

摘要:

研究了量子猝灭后Luttinger模型的动力学行为。我们详细计算一点和两点关联函数的两种类型的猝灭:从一个非相互作用的相互作用的Luttinger模型,反之亦然。在前一种情况下,非相互作用费米气体在动量分布和其他关联函数中的特征随着时间的推移而被破坏。在无限时间的限制,等时间的相关性是幂律,但临界指数被发现不同于其平衡值。在所有情况下,我们发现这些相关性很好地描述了广义吉布斯系综[M。Rigol等人,物理修订版信函98,050405(2007)],其为每个本征模分配动量相关温度。

英文摘要:

The dynamics of the Luttinger model after a quantum quench is studied. We compute in detail one and two-point correlation functions for two types of quenches: from a non-interacting to an interacting Luttinger model and vice-versa. In the former case, the non-interacting Fermi gas features in the momentum distribution and other correlation functions are destroyed as time evolves. In the infinite-time limit, equal-time correlations are power-laws but the critical exponents are found to differ from their equilibrium values. In all cases, we find that these correlations are well described by a generalized Gibbs ensemble [M. Rigol et al., Phys. Rev. Lett. 98, 050405 (2007)], which assigns a momentum dependent temperature to each eigenmode.

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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