In a spacetime with asymptotically anti-de-Sitter boundaries,
localized bulk events produce characteristic signals at boundary
locations that are lightlike from the event. I will describe
(thought) experiments that use boundary wavepackets to...
I will explore one of the most profound open question in
particle physics, focusing on some exciting directions of my
ongoing research activity: the strong CP problem. I will begin with
an overview of the strong CP problem, highlighting proposed...
In large N theories with a gravity dual, generic heavy operators
should be dual to black holes in the bulk. The microscopic details
of such operators should then be irrelevant in the low energy
theory. We look for such universality in the strong...
I will discuss the path integral of pure 3D gravity on a finite
region of spacetime, with boundary conditions that fix dihedral
angles or geodesic lengths. This amplitude calculates corrections
to the Gaussian statistics of OPE coefficients in the...
I will explain how the irreversibility of the renormalization
group together with anomalies, including anomalies in the space of
coupling constants, can be used to constrain the IR phases of
defects in familiar quantum field theories. As an example...
Drawing inspiration from AdS/CFT holography, I will discuss the
idea that a static patch in de Sitter space admits a fundamental
description based upon standard quantum mechanics. Taking a
bottom-up perspective, I compute correlation functions of...
Symmetries play a crucial role in both quantum field theory and
quantum many-body systems on the lattice. One key topological
feature that a global symmetry can have is a "('t Hooft) anomaly".
But how exactly should an anomaly be defined? In this...
Black hole perturbation theory captures a few important effects
in the dynamics of binary mergers, such as tidal deformations and
the decay of ringdown modes. It also describes the physics of the
photon ring. However, extracting qualitative results...
Mostly concerning Lorentz-invariance and the
matrix-approximation of membranes ( GH1982: http:/dspace.mit.edu/handle/1721.1/15717, G1985,
BFFS1997: Phys.Rev.D 55, 5512 ), as well as non-commutative
string-theory ( JH1996: hep-th/9602020, IKKT1996...
Quantum condensed matter has traditionally focused on ground
states and equilibrium properties of spatially extended systems,
such as electrons in crystalline materials. However, the advent of
noisy-intermediate-scale-quantum (NISQ) devices has...
