Superradiant instabilities may create clouds of ultralight
bosons around rotating black holes, forming so-called
"gravitational atoms". In this talk, I will review a series of
papers that study the effects of a binary companion’s presence.
The...
In recent years, there have been various activities trying to
better understand the interplay between non-invertible global
symmetries and boundary conditions in quantum field theories, with
applications ranging from scattering of solitons to...
I’ll discuss an old technique called intensity interferometry,
pioneered by Hanbury Brown and Twiss (HBT) that allows us to
achieve sub-microarcsecond angular resolution using ordinary
ground-based optical telescopes observing visible light.
This...
Based on https://arxiv.org/abs/2408.11139 .
In this talk we'll explain how self-dual metrics (which correspond
to spacetimes containing only positive helicity gravitons) can be
written as a sum over connected "tree" diagrams, which are
different...
Planetary systems are shaped as much by destructive
processes --- N-body instabilities, catastrophic impacts, and
atmospheric loss --- as by accretionary ones. We examine the
histories of violence written in: (a) the orbital architectures of
super...
A key challenge for computation is solving problems in high
dimensions. Two classic proposals for tackling high dimensional
problems are the Bethe approximation, or "belief propagation", and
the quantum Fourier transform. Tensor networks offer a...
