Quantum N = 2 Supersymmetric Black Holes in the S-T Model

TL;DR

This paper investigates quantum-corrected black hole solutions within the heterotic S-T model, emphasizing duality invariance and proposing a microscopic membrane gas interpretation for entropy corrections.

Contribution

It provides explicit expressions for the entropy that are invariant under target-space duality and offers a novel microscopic interpretation involving closed membranes.

Findings

Entropy expression is duality invariant.

Microscopic interpretation as a membrane gas.

Quantum corrections significantly affect black hole entropy.

Abstract

We consider axion-free quantum corrected black hole solutions in the context of the heterotic S-T model with half the N=2, D=4 supersymmetries unbroken. We express the perturbatively corrected entropy in terms of the electric and magnetic charges in such a way, that target-space duality invariance is manifest. We also discuss the microscopic origin of particular quantum black hole configurations. We propose a microscopic interpretation in terms of a gas of closed membranes for the instanton corrections to the entropy.