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arXiv 2103.12798hep-th
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全息CFTs的时间周期性

Time-periodicities in holographic CFTs

Ben Craps, Marine De Clerck, Oleg Evnin

摘要:

AdS时空中的动力学具有不同的时间周期性。其中最明显的是线性化场的时间周期演化,其正常频率形成整数间隔阶梯,这是共形群表示结构的直接结果。也有明确已知的时间周期性的现象,在更长的时间尺度成反比的耦合在弱非线性制度。我们问,如果在大的中心荷极限下,全息CFT再现了AdS体动力学,那么在全息CFT中,这些长时间周期对应于什么?答案是一个非常大的多粒子算符家族,其共形维数形成简单的阶梯,其间距与中心荷成反比。我们给出了一个明确的演示,这些想法的背景下,涉及$ϕ^4$探针标量场在AdS的玩具模型全息,但我们预计的适用性的基础结构要普遍得多。

英文摘要:

Dynamics in AdS spacetimes is characterized by various time-periodicities. The most obvious of these is the time-periodic evolution of linearized fields, whose normal frequencies form integer-spaced ladders as a direct consequence of the structure of representations of the conformal group. There are also explicitly known time-periodic phenomena on much longer time scales inversely proportional to the coupling in the weakly nonlinear regime. We ask what would correspond to these long time periodicities in a holographic CFT, provided that such a CFT reproducing the AdS bulk dynamics in the large central charge limit has been found. The answer is a very large family of multiparticle operators whose conformal dimensions form simple ladders with spacing inversely proportional to the central charge. We give an explicit demonstration of these ideas in the context of a toy model holography involving a $ϕ^4$ probe scalar field in AdS, but we expect the applicability of the underlying structure to be much more general.

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