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arXiv · 2105.12594

Averaging over moduli in deformed WZW models

Junkai Dong·Thomas Hartman·Yikun Jiang
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Abstract

WZW models live on a moduli space parameterized by current-current deformations. The moduli space defines an ensemble of conformal field theories, which generically have $N$ abelian conserved currents and central charge $c > N$. We calculate the average partition function and show that it can be interpreted as a sum over 3-manifolds. This suggests that the ensemble-averaged theory has a holographic dual, generalizing recent results on Narain CFTs. The bulk theory, at the perturbative level, is identified as $U(1)^{2N}$ Chern-Simons theory coupled to additional matter fields. From a mathematical perspective, our principal result is a Siegel-Weil formula for the characters of an affine Lie algebra.

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Junkai Dong, Thomas Hartman, Yikun Jiang. 2021-05-26. Averaging over moduli in deformed WZW models. https://doi.org/10.1007/jhep09(2021)185

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