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arXiv 1302.2953cond-mat.str-el
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自旋链量子猝灭后预热化区的关联函数

Correlation functions in the prethermalized regime after a quantum quench of a spin-chain

Aditi Mitra

摘要:

结果提出了两点关联函数的自旋链量子淬火后的中间时间制度的非弹性效应是弱的。一个Callan-Symanzik方程的关联函数明确构造,这是用来显示三个不同的标度制度的外观。一种是光锥内的空间分离,第二种是光锥上的空间分离,第三种是光锥外的空间分离。在这三个制度中,关联函数被发现衰减与幂律的非平衡指数,不同于那些在平衡,以及从淬火中获得的二次Luttinger液体理论。详细讨论了标度的存在如何依赖于失超前的初态性质。

英文摘要:

Results are presented for a two-point correlation function of a spin-chain after a quantum quench for an intermediate time regime where inelastic effects are weak. A Callan-Symanzik like equation for the correlation function is explicitly constructed which is used to show the appearance of three distinct scaling regimes. One is for spatial separations within a light-cone, the second is for spatial separations on the light-cone, and the third is for spatial separations outside the light-cone. In these three regimes, the correlation function is found to decay with power-laws with nonequilibrium exponents that differ from those in equilibrium, as well as from those obtained from quenches in a quadratic Luttinger liquid theory. A detailed discussion is presented on how the existence of scaling depends on the properties of the initial state before the quench.

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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