When absorbing boundary conditions are used to evaporate a black
hole in AdS/CFT, we show that there is a phase transition in the
location of the quantum Ryu-Takayanagi surface, at precisely the
Page time. The new RT surface lies slightly inside the...
The EHT Collaboration has recently published images of the
supermassive black hole in M87. The images are dominated by a
bright ring-like structure with an angular brightness asymmetry.
While the diameter of this ring is resolved by the EHT, its...
This talk will review the structure of closed superstring
scattering amplitudes with particular emphasis on the constraints
imposed by various dualities. This leads to precise determination
of the coefficients of low order terms in the low energy...
Gauge/gravity duality relates certain strongly coupled CFTs with
large effective central charge to semi-classical gravitational
theories with AdS asymptotics. I will describe recent progress in
understanding gravity duals for CFTs on non-trivial...
We construct a general form for an F-theory Weierstrass model over
any base giving a 6D or 4D supergravity theory with gauge group
SU(3) x SU(2) x U(1) / Z_6 and associated generic matter. The
concept of 'generic matter' can be rigorously defined in...
We review a recent geometric formulation of the tree-level S-matrix
of various quantum field theories, including gauge and gravity
theories, in terms of intersection numbers of twisted cohomology
groups on the moduli space of genus-zero curves with...
I will discuss recent progress about the Cardy-like asymptotics of
4d supersymmetric index on S^3, also known as superconformal index.
The main observation is that Bose-Fermi cancellation that
trivializes the asymptotic expression of the index can...
This talk will give a brief overview focused on six papers written
by D. Gaiotto, G. Moore, and A. Neitzke
loosely centered around the topics mentioned in the title. The
papers are on the arXiv.
Background reading: Some short reviews are: https:/...
We present a first-principles derivation of a weak-strong duality
between the four-dimensional fishnet theory in the planar limit and
a discretized string-like model living in AdS5. At strong coupling,
the dual description becomes classical and we...
We will introduce ourselves and give a 2 minute description of what
we are interested in at the moment.
The plan for future group meetings is to have some review talks, or
topics for discussions. So please think about suggestions for
things you...
