One-loop quantization of Euclidean D3-branes in holographic backgrounds

Abstract

In this note we analyze the semi-classical quantization of D3 branes in three different holographic backgrounds in type IIB string theory. The first background is Euclidean AdS$_5$ with $S^1\times S^3$ boundary accompanied with a twist to preserve supersymmetry. We work out the spectrum of fluctuations around the classical D3-brane configuration, compute its one-loop partition function, and match to the non-perturbative correction to the superconformal index of ${\cal N}=4$ SYM. We then study Euclidean D3-branes in the Pilch-Warner geometry dual to the IR Leigh-Strassler fixed point of ${\cal N}=1^*$ with the aim to find non-perturbative corrections to its index. Finally we study Euclidean D3-branes in the non-geometric ${\cal N}=2$ J-fold background which is dual to the gauging of the 3D Gaiotto-Witten SCFT.