Conveners
R-DTP-1: Theoretical Physics I
- Mark Walton (University of Lethbridge)
Quantum systems in gravitational fields (particularly with horizons) are often plagued by paradoxical predictions at very late times. Examples include predictions for information loss in black holes and for properties of eternal inflation. This talk argues that generic problems exist making such predictions because perturbative methods generically fail at very late times. Similar issues arise...
A key challenge to the standard cosmological model is the observation
of very massive (M > 10^9 Msun) and luminous (L > 10^{13} Lsun)
quasars already in place by z~7, when the age of the universe was
just ~800 Myr. The formation of such supermassive black holes (SMBH)
cannot generally occur in the time available if starting from
stellar mass black holes. We explore implications of...
A new generalization of the Hawking-Hayward quasilocal mass to scalar-tensor gravity is compared, for vacum asymptotically flat stationary geometries, with multipole expansion of the gravitational field in this class of theories. The quasilocal mass at spatial infinity coincides with the monopole term, a necessary check lending credibility to this construct.
[Based on V. Faraoni & J. Côté,...
