论文标题

在Virasoro上六点身份块和混乱

On the Virasoro six-point identity block and chaos

论文作者

Anous, Tarek, Haehl, Felix M.

论文摘要

我们研究了六点相关函数,以二维形式的共形场理论,其中六个操作员成对分组具有相等的保形维度。假设中央电荷$ C $和稀疏频谱,对此相关函数的主要贡献是六点Virasoro身份块 - 对应于每个不同的操作员,将其融合到身份及其后代中。我们将其称为星频道。星通道身份块中的一个特殊术语是应力张量$ sl(2,\ mathbb {r})$(global)块,为此我们得出明确的表达式。在全息环境中,该对象对应于纯重力中非线性效应的直接度量。我们使用新颖的重新构度理论以与全球块相同的$ c $以相同顺序贡献的星通道身份块中的其他术语,该理论以自然的方式扩展了影子操作员的形式。我们以六点的划分相关器的形式研究了这些块与量子混乱的相关性。有趣的是,全局块并不促进此相关器的争夺模式,这意味着,对于领先的顺序,六点争夺对散装双重双重的三分重力耦合不敏感。最后,我们将发现与不同的OPE通道(称为梳子通道)进行了比较,并在此分解中找到了混乱指数的相同结果。

We study six-point correlation functions in two dimensional conformal field theory, where the six operators are grouped in pairs with equal conformal dimension. Assuming large central charge $c$ and a sparse spectrum, the leading contribution to this correlation function is the six-point Virasoro identity block - corresponding to each distinct pair of operators fusing into the identity and its descendants. We call this the star channel. One particular term in the star channel identity block is the stress tensor $SL(2,\mathbb{R})$ (global) block, for which we derive an explicit expression. In the holographic context, this object corresponds to a direct measure of nonlinear effects in pure gravity. We calculate additional terms in the star channel identity block that contribute at the same order at large $c$ as the global block using the novel theory of reparametrizations, which extends the shadow operator formalism in a natural way. We investigate these blocks' relevance to quantum chaos in the form of six-point scrambling in an out-of time ordered correlator. Interestingly, the global block does not contribute to the scrambling mode of this correlator, implying that, to leading order, six-point scrambling is insensitive to the three-point graviton coupling in the bulk dual. Finally, we compare our findings with a different OPE channel, called the comb channel, and find the same result for the chaos exponent in this decomposition.

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