Abstract: I will describe a quantum mechanical model involving
interacting fermions without disorder that has the same low energy
physics as the supersymmetric SYK model. The model is SU(2)
invariant, and the supercharge involves the SU(2) 3j...
Abstract: In gauge theories with
Chern-Simons interactions, the Gauss law -- the requirement that
physical states be gauge invariant -- implies that the quantum
wavefunction is naturally a section of a nontrivial line bundle
over the space of...
Abstract: With only one joint gravitational
wave (GW)-electromagnetic (EM) detection to date, observations of
the EM counterparts to neutron star mergers are a key path to
probing the physics of these unique systems and predicting the
behavior of...
Abstract: We often say two gapped lattice
Hamiltonians are in the same topological phase if they are
connected by a path of gapped Hamiltonians. For 2D spin systems, it
is conjectured that each phase is uniquely specified by the modular
tensor...
Abstract: Features of the black hole interior
can be extracted from the analytic structure of boundary
correlation functions. Working in the geodesic approximation, we
find analytic continuations that probe the interior of rotating and
charged black...
Abstract: We introduce stratified symmetry
operators and stratified anomalies, which generalize onsite
symmetry operators and onsite projective representations in quantum
lattice systems. A stratified symmetry operator is a symmetry
operator that...
Abstract: We present a unified geometric
perspective on the symmetries underlying the spin 0, 1, and 2
static perturbations around a Schwarzschild black hole. The
symmetries are exact, each forming an SO(3,1) group. They can be
formulated at the...
Abstract: I will introduce a new framework to
understand what a lattice QFT “really is” in relation to continuum
QFT, by elevating the physically intuitive idea behind the Villain
model into the mathematical language of higher category theory.
Long...
Abstract: I will discuss the Euclidean path integral of minimal
higher spin theory on the four-sphere and argue for a gluing
formula in which the four-sphere is obtained by joining two
hemispheres along an $S^3$ boundary. The resulting boundary...
Abstract: We explain how to tropicalize scalar
quantum field theory and show that tropicalized massive scalar
quantum field theory is exactly solvable. This exact solution
manifests as a non-linear recursion equation fulfilled by the
expansion...
