Exact Embeddings of JT Gravity in Strings and M-theory

TL;DR

This paper demonstrates that two-dimensional JT gravity can be exactly embedded in string and M-theory frameworks through consistent Kaluza-Klein reductions of higher-dimensional EMD theories, revealing new holographic duals and black hole solutions.

Contribution

It provides the first exact embeddings of JT gravity into string and M-theory, connecting lower-dimensional gravity to higher-dimensional supergravity and brane configurations.

Findings

JT gravity solutions can be lifted to charged extremal black holes.

Embedded solutions include D1/D5-branes with Milne universe worldsheet.

Exact embeddings establish holographic duals in string/M-theory.

Abstract

We show that two-dimensional JT gravity, the holographic dual of the IR fixed point of the SYK model, can be obtained from the consistent Kaluza-Klein reduction of a class of EMD theories in general $D$ dimensions. For $D=4$, $5$, the EMD theories can be themselves embedded in supergravities. These exact embeddings provide the holographic duals in the framework of strings and M-theory. We find that a class of JT gravity solutions can be lifted to become time-dependent charged extremal black holes. They can be further lifted, for example, to describe the D1/D5-branes where the worldsheet is the Milne universe, rather than the typical Minkowski spacetime.