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Generalized Spectral Form Factors and the Statistics of Heavy Operators

Alexandre Belin, Jan de Boer, Pranjal Nayak, Julian Sonner

11/11/21 Published in : arXiv:2111.06373

The spectral form factor is a powerful probe of quantum chaos that diagnoses the statistics of energy levels, but is blind to other features of a theory such as matrix elements of operators or OPE coefficients in conformal field theories. In this paper, we introduce generalized spectral form factors: new probes of quantum chaos sensitive to the dynamical data of a theory. These quantities can be studied using an effective theory of quantum chaos. We focus our attention on a particular combination of heavy-heavy-heavy OPE coefficients that generalizes the genus-2 partition function of two-dimensional CFTs, for which we define a spectral form factor. We probe the statistics of heavy-heavy-heavy OPE coefficients and confirm the OPE Randomness Hypothesis: these coefficients have a random matrix component in the ergodic regime. The EFT of quantum chaos predicts that the genus-2 spectral form factor displays a ramp and a plateau. Our results suggest that this is a common property of generalized spectral form factors.

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Research project(s)

  • String Theory

Near critical scaling relations for planar Bernoulli percolation without differential inequalities

New renormalons from analytic trans-series

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