Abstract: Black hole horizons have been a
mystery for more than a hundred years. What if they do not exist?
Black shells are horizonless black hole mimickers inspired by
string theory. The lecture introduces the physics of black shells
as well as...
Abstract: I will present the proof of a
conjectured relation between the energy-momentum tensor and the
displacement norm of superconformal defects. I will discuss
implications for the definition of an invariant tension
in Anti-de Sitter gravity...
Abstract: Compact stars, such as neutron stars
or white dwarfs, often collide with bigger, non-degenerate stars.
In this interaction, the NS captures copious amounts of matter that
flows inwards. The density of the gas in this scenario is so
high...
Abstract: Can we regularize chiral global
symmetries and their anomalies on a lattice with a finite
dimensional Hilbert space? We discuss how the vector and axial U(1)
symmetries of a massless Dirac fermion in 1+1d are realized in the
conventional...
Abstract: We focus on understanding how the
synchrotron emission morphology of astrophysical jet phenomena is
influenced by physical properties of the relativistic plasma within
the jet stream. To achieve this, we compare observational data in
multi...
Abstract: On-shell methods have found a new
application to local observables such as asymptotic radiation
fields and gravitational waveforms. While these observables are
invariant under small gauge transformations, they are known to
depend on a...
Abstract: Energy and information are
deeply connected in quantum field theory and quantum gravity. I
will describe an explicit protocol for an observer outside a
black hole to send in quantum information at zero energy cost. This
clarifies what sort...
