Do typical black hole microstates have semiclassical interiors?
I will present a constructive approach to this question, where we
prepare ensembles of black hole interiors with long wormholes using
Brownian matter sources. Evaluating the frame...
The path integral of pure 3D gravity is formulated on a finite
region of spacetime, with boundary conditions that fix dihedral
angles or geodesic lengths. This amplitude calculates statistics of
black hole matrix elements in the dual CFT. The fixed...
It has recently been understood from several points of view that
the Hilbert space of quantum gravity in a closed universe has
dimension one. It has also been argued that this problem can
be ameliorated by explicitly including the observer in the...
Supermassive black hole mergers are extraordinary cosmic
phenomena characterized by their immense energy release, producing
gravitational waves that can rival the total light output of all
stars in the universe within a short time frame. These...
I will review the Penrose and Wall singularity theorems and
describe their limitations. Following Shahbazi-Moghaddam, I will
argue that semiclassical gravity in the infinite species limit
becomes an exact theory whose metric is defined on all
scales...
Not much is known about what happens at the end of black hole
evaporation. Pushing the semi-classical evolution well beyond its
regime of validity suggests that the final Cauchy slice breaks into
a piece that remains behind the event horizon...
How and where do black hole mergers form in our Universe? After
10 years of GW science with LIGO/Virgo/Kagra, there still seems to
be no direct indication of what the underlying astrophysical
formation channels are. I will present ideas and ongoing...
Tidal disruption events — where an unfortunate star is destroyed
by a previously quiescent supermassive black hole — offer a unique
probe of the low mass end of the supermassive black hole
population. Recent observational advances have lead to the...
The interstellar medium (ISM) is a turbulent, multi-phase,
magnetic environment. It is home to vastly different gas phases,
from cold, dense clouds to hot, tenuous plasma. Magnetic fields
thread this interstellar environment, helping to sculpt...
