JHEP 1810 (2018) 063             arXiv link

Universal structure of covariant holographic two-point functions in massless higher-order gravities

Yue-Zhou Li, H. Lü^∗, Zhan-Feng Mai

Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin, 300350, China

*Corresponding author: 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.