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arXiv 1111.7275hep-thcond-mat.str-el
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全息量子猝灭

Holographic Quantum Quench

Sumit R. Das

摘要:

本文讨论了利用全息对应研究强耦合场论在含时耦合中演化的最新结果。目的是了解(i)热化和(ii)当耦合穿过临界点时的普遍行为。我们的重点是在一个子集的散装字段可以被视为在探测近似的情况下。我们考虑两种不同的设置。首先,缺陷共形场论在AdS时空中用探针膜描述,由于探针扇区中的依赖于时间的耦合,初始真空态演化。虽然黑洞的形成是不可见的,在这种近似下,我们表明,热化仍然可以发生-这是由膜世界体积上的表观视界的形成。在第二个设置中,我们考虑了一个探针体标量场的AdS黑膜的背景。在平衡时,当对偶算符的源消失时,该系统在某一温度下经历临界相变。对于一个依赖于时间的源,它穿过这个临界点,我们表明,零模式的体场占主导地位的动态,并导致缩放行为的序参量的变化率的函数。

英文摘要:

We discuss recent results in the study of the evolution of strongly coupled field theories in the presence of time dependent couplings using the holographic correspondence. The aim is to understand (i) thermalization and (ii) universal behavior when the coupling crosses a critical point. Our emphasis is on situations where a subset of bulk fields can be treated in a probe approximation. We consider two different setups. In the first, defect conformal field theories are described by probe branes in AdS space-times, and an initial vacuum state evolves due to a time dependent coupling in the probe sector. While a black hole formation is invisible in this approximation, we show that thermalization can nevertheless happen - this is signalled by formation of apparent horizons on the brane worldvolume. In the second setup, we consider a probe bulk scalar field in the background of a AdS black brane. In equilibrium, this system undergoes a critical phase transition at some temperature when the source for the dual operator vanishes. For a time dependent source which goes across this critical point, we show that a zero mode of the bulk field dominates the dynamics and leads to scaling behavior of the order parameter as a function of the rate of change.

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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