Eur.Phys.J. C 78 (2018) no.9, 791 arXiv link
Exact embeddings of JT gravity in strings and M-theory
Yue-Zhou Li1, Shou-Long Li2, H. Lü1∗
1. Department of Physics, Tianjin University, Tianjin 300350, China
2. Department of Physics, Beijing Normal University, Beijing 100875, China
∗ Corresponding Authors: mrhonglu@gmail.com
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.
