Consistent reductions of IIB*/M* theory and de Sitter supergravity

TL;DR

This paper develops consistent non-linear Kaluza-Klein reduction methods for certain IIB* and M* theories, enabling the uplift of de Sitter supergravity solutions and black holes to higher dimensions, revealing new connections between lower and higher-dimensional theories.

Contribution

It introduces new reduction ansatze for IIB* and M* theories that produce de Sitter supergravities and allows lifting of black hole solutions to ten and eleven dimensions.

Findings

Reduction ansatze for IIB* and M* theories established.

De Sitter black holes can be uplifted to higher dimensions.

Lifted solutions include rotating E4-branes in IIB* theory.

Abstract

We construct consistent non-linear Kaluza Klein reduction ansatze for a subset of fields arising from the reduction of IIB* and M* theory on dS_5 x H^5 and dS_4 x AdS_7, respectively. These reductions yield four and five-dimensional de Sitter supergravities, albeit with wrong sign kinetic terms. We also demonstrate that the ansatze may be used to lift multi-centered de Sitter black hole solutions to ten and eleven dimensions. The lifted dS_5 black holes correspond to rotating E4-branes of IIB* theory.