In the original CPT theorem one is restricted to flat space and
is unable to make converse statements. In this talk I will show how
we can reformulate the CPT theorem using a symmetry argument and
generalise it to beyond flat space. This in turn...
The Milky Way contains of order 10^8 stellar-mass black holes
(BHs). Yet, fewer than 100 BH candidates are known, and only about
20 are dynamically confirmed. Our view of the BH population has
been shaped almost entirely by observations of X-ray...
The connection between 3d pure gravity and Chern-Simons theory
has been proposed and studied for decades. In this talk, I will
give a brief review of the works 2304.13650 and 2401.13900 with
Scott Collier and Lorenz Eberhardt, where we sharpen this...
I will describe the one-loop partition function for strings
propagating on AdS3 geometries with NS-NS flux (for generic values
of AdS radius in string units). The essential ingredients
that go into this analysis have been known for a while. The
goal...
Star-shredding supermassive black holes (Tidal Disruption
Events, TDEs) are potential emitters of high energy hadrons and
neutrinos. Several TDEs have been observed as coincident with
neutrino events detected at the IceCube neutrino observatory.
I...
I will describe a double scaled matrix and tensor integral whose
Feynman diagrams can be organized in a 3d topological expansion
which agrees term by term with partition functions of 3d gravity.
The integral is taken over CFT2 data, and the limiting...
This will be an informal presentation / discussion of the basics
of holographic theories that live on Cauchy slices
(arXiv:2204.00591), which can be constructed by the TTbar
deformation. Please feel free to bring in questions and I
will try to...
Recent horizon-scale images of Messier 87* and Sagittarius A*
have been used to demonstrate that their spacetimes are
well-described by the Kerr metric. The latter is a solution to the
vacuum Einstein equations of general relativity, and is used
to...
In this talk, I will review recent progress in understanding the
complex multi-scale plasma physics of neutron star magnetospheres
through the lens of first-principles particle-in-cell simulations.
I will highlight pair production discharges near...
The TTbar deformation is a holographic theory describing
holography a finite distance in the bulk. If this
theory can be UV completed, it could be a model of nonperturbative
bulk quantum gravity. However, it seems to be a non-unitary
theory, as...
