Formalism
Definition
Spacetime configurations
Properties
Spacetimes
black hole spacetimes | vanishing angular momentum | positive angular momentum |
---|---|---|
vanishing charge | Schwarzschild spacetime | Kerr spacetime |
positive charge | Reissner-Nordstrom spacetime | Kerr-Newman spacetime |
Quantum theory
One may consider gravity (general relativity, Einstein's equations) on spacetimes of dimension 2.
If 2d gravity is coupled to scalar “matter”-fields with values in some target space, then this may be regarded as the worldsheet-sigma-model quantum field theory of a relativistic string propagating on that target spacetime.
A form of 2d dilaton gravity is known as Jackiw-Teitelboim gravity, or JT-gravity, for short.
JT-gravity gives a good approximation to the AdS-factor in the near horizon geometry of near-extremal black holes in -dimensional spacetime (NSST18, MTV18).
Created on January 11, 2021 at 05:26:27. See the history of this page for a list of all contributions to it.