More on N=8 Attractors

TL;DR

This paper explores extremal black hole configurations in N=8 supergravity, analyzing their entropy and embedding, and clarifies the relationship between BPS and non-BPS black holes using the attractor mechanism.

Contribution

It provides new insights into the connection between different black hole solutions in N=8 supergravity and demonstrates how their entropy can be derived via the attractor mechanism.

Findings

Classical entropy matches Bekenstein-Hawking formula for studied black holes

Relation established between BPS and non-BPS black hole configurations

Embedding of axion-dilaton black hole into N=8 supergravity shown

Abstract

We examine few simple extremal black hole configurations of N=8, d=4 supergravity. We first elucidate the relation between the BPS Reissner-Nordstrom black hole and the non-BPS Kaluza-Klein dyonic black hole. Their classical entropy, given by the Bekenstein-Hawking formula, can be reproduced via the attractor mechanism by suitable choices of symplectic frame. Then, we display the embedding of the axion-dilaton black hole into N=8 supergravity.