Non-extremal fractional branes

TL;DR

This paper constructs non-extremal fractional D-brane solutions in type-II string theory at the K3 orbifold point, revealing limitations on horizon size and implications for gauge theories and dual descriptions.

Contribution

It introduces non-extremal fractional brane solutions that extend extremal cases, providing new insights into their properties and dual gauge theories.

Findings

Horizon radius cannot exceed the non-extremal enhancon radius

Non-extremal fractional branes cannot form black branes

Results align with dual gauge theory descriptions

Abstract

We construct non-extremal fractional D-brane solutions of type-II string theory at the Z_2 orbifold point of K3. These solutions generalize known extremal fractional-brane solutions and provide further insights into N=2 supersymmetric gauge theories and dual descriptions thereof. In particular, we find that for these solutions the horizon radius cannot exceed the non-extremal enhancon radius. As a consequence, we conclude that a system of non-extremal fractional branes cannot develop into a black brane. This conclusion is in agreement with known dual descriptions of the system.