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摘要翻译：
本文研究了扩展量子系统中哈密顿量参数淬灭后关联函数的时间演化。我们证明了用d+1维边界临界现象的方法可以提取d维的相关函数。对于d=1，这允许在临界演化的情况下使用共形场论的强大工具。在高斯（平均场）近似下，在一般维上得到了几个结果。这些预测与一些可解模型的实时演化进行了检查，这些可解模型还允许理解哪些特征在临界演化之外是有效的。我们所有的发现都可以用一个普遍有效的图景来解释，即准粒子在初始状态下纠缠在关联长度数量级的区域上，然后以有限的速度传播通过系统。此外，我们还证明了长时间的结果可以用广义吉布斯系综来解释。我们讨论了一些悬而未决的问题和未来可能的发展。
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英文标题：
《Quantum Quenches in Extended Systems》
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作者：
Pasquale Calabrese, John Cardy
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最新提交年份：
2007
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分类信息：
一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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一级分类：Physics 物理学
二级分类：High Energy Physics - Theory 高能物理-理论
分类描述：Formal aspects of quantum field theory. String theory, supersymmetry and supergravity.
量子场论的形式方面。弦理论，超对称性和超引力。
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英文摘要：
We study in general the time-evolution of correlation functions in a extended quantum system after the quench of a parameter in the hamiltonian. We show that correlation functions in d dimensions can be extracted using methods of boundary critical phenomena in d+1 dimensions. For d=1 this allows to use the powerful tools of conformal field theory in the case of critical evolution. Several results are obtained in generic dimension in the gaussian (mean-field) approximation. These predictions are checked against the real-time evolution of some solvable models that allows also to understand which features are valid beyond the critical evolution. All our findings may be explained in terms of a picture generally valid, whereby quasiparticles, entangled over regions of the order of the correlation length in the initial state, then propagate with a finite speed through the system. Furthermore we show that the long-time results can be interpreted in terms of a generalized Gibbs ensemble. We discuss some open questions and possible future developments.
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PDF链接：
https://arxiv.org/pdf/704.188
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