In double-scaled SYK, the chord diagrams of Berkooz et al. give
rise to a bulk algebra and geometry. The algebra is a "quantum
deformation" of the JT gravitational algebra that includes a
deformation of SL(2,R). The growth of operator size (in...
Spacetime wormholes can lead to surprises in black hole physics.
We show that a very old black hole can tunnel to a white
hole/firewall by emitting a large baby universe. We study the
process for a perturbed thermofield double black hole in
Jackiw...
One puzzling aspect of holography is that it conjectures a
duality between a physical theory with a single rigid causal
structure (the non-gravitational "boundary theory") and one whose
causal structure is state-dependent (the gravitational "bulk...
Cauchy slice holography gives a duality between the wavefunction
on a Cauchy slice and the partition function of a T2 deformed
field theory. I will review this correspondence and discuss
its implications for the black hole information puzzle.
The...
On August 17, 2017, LIGO/Virgo detected the first
gravitational waves from merging neutron stars. This event, known
as GW170817 was accompanied by observations all over the
electromagnetic spectrum. The peculiar gamma-ray burst that
followed the...
AGN feedback is now widely considered to be one of the main
drivers in regulating the growth of massive galaxies. In my talk I
will describe several efforts in our group to understand the power,
reach and impact of AGN feedback processes. We find...
Symmetries of Quantum Field Theories (QFTs), whose fusion does
not satisfy a group multiplication law, are generally referred to
as non-invertible. I will discuss their connection to generalized
gauging and higher fusion categories, providing by...
Motivated by holographic duality and the Ryu-Takyanagi formula,
we ask the question, “What quantum problem are Einstein’s equations
solving?” Answering this question amounts to dissecting or
“deconstructing” AdS/CFT to identify the quantum...
