paper

The Cardy limit of the topologically twisted index and black strings in AdS

arXiv:1611.09374 · doi:10.1007/JHEP04(2017)014

Abstract

We evaluate the topologically twisted index of a general four-dimensional gauge theory in the "high-temperature" limit. The index is the partition function for theories on , with a partial topological twist along , in the presence of background magnetic fluxes and fugacities for the global symmetries. We show that the logarithm of the index is proportional to the conformal anomaly coefficient of the two-dimensional SCFTs obtained from the compactification on . We also present a universal formula for extracting the index from the four-dimensional conformal anomaly coefficient and its derivatives. We give examples based on theories whose holographic duals are black strings in type IIB backgrounds AdS, where SE are five-dimensional Sasaki-Einstein spaces.

31 pages, V2: minor corrections, refs added, V3: minor corrections, published version, V4: few signs corrected

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