Speaker
Mark Van Raamsdonk
(The University of British Columbia)
Description
We describe how the holographic approach to quantum gravity might be used to give a full-fledged quantum gravity description of big-bang cosmology. The resulting cosmological models have a negative cosmological constant but can generically explain late-time acceleration due to the potential energy of time-dependent scalar fields associated with relevant scalar operators in the CFT. If such models can describe realistic cosmology, they would predict time-dependent dark energy that decreases and eventually switches sign, leading to a big crunch. We show that such decreasing dark energy is consistent with and perhaps even preferred by scale factor evolution data deduced from supernova and BAO observations.
| Keyword-1 | Holography |
|---|---|
| Keyword-2 | Cosmology |
| Keyword-3 | Quantum gravity |
Authors
Chris Waddell
(Perimeter Institute)
Mark Van Raamsdonk
(The University of British Columbia)
