Abstract: In this talk, I will discuss
Cosmohedra. These are geometric objects which encode the vacuum
wavefunction for theories with colored scalars with cubic
interactions. I will start by introducing the vacuum wavefunction,
both in Minkowski and...
Abstract: I will briefly review one-loop
gravitational path integral around Euclidean de Sitter space $S^D$,
focusing on a complex phase which was recently proposed to be
mostly canceled by including an observer. I will then explore this
proposal in...
Abstract: I will briefly review the
obstacles to constructing Anti–de Sitter vacua in string theory
with very small extra dimensions compared to the AdS length, and
the main ideas proposed to overcome them. I will then focus on a
particular class of...
This semester, we will be beginning a *very informal*
get-together every Monday of people interested in/working on
phenomenology and new theories beyond the standard model. The
idea is to discuss over lunch, perhaps meet up around 12.20, grab
lunch...
Abstract: In 2017, a proposal was made for
defining RT surfaces in asymptotically flat spacetimes, with the
goal of computing the entanglement entropy in a putative dual
theory.
To avoid confusion with the usual RT prescription, the
resulting...
Abstract: I will introduce an effective
field theory which describes scattering in the Regge limit in a
systematic triple expansion in terms of t/s, Gt, and G^2st. Using
the usual properties of the S-matrix, along with the emergent
symmetries of the...
Abstract: String spectra comprise infinitely
many physical states of arbitrarily high mass and spin, the
presence of all of which is crucial to the good UV behaviour of
string scattering amplitudes. Yet what do all these states look
like? In this...
This semester, we will be beginning a *very informal*
get-together every Monday of people interested in/working on
phenomenology and new theories beyond the standard model. The
idea is to discuss over lunch, perhaps meet up around 12.20, grab
lunch...
Abstract: Schrodinger CFTs describe
non-relativistic fixed points with dynamical critical exponent z=2;
including the BCS-BEC crossover, heavy atoms in a harmonic trap,
nuclear physics EFTs, stochastic/Langevin systems, and
null-reductions of...
