Cosmological data has opened up new vistas on fundamental
physics yet it is limited in its scope. While it has given us
tantalizing hints at how the Universe might be expanding, it is
unclear whether it can ever be used to find the
microphysical...
I will present the first three-dimensional, full-sky dust map
with variations in extinction curves, parameterized by R(V).
Leveraging Gaia XP spectra, we have determined extinction curves
for 130 million stars—two order of magnitude more than...
With increasingly precise measurements of the small-scale cosmic
microwave background (CMB), the kinetic Sunyaev-Zel’dovich (kSZ)
effect has emerged as a powerful probe of cosmology and
astrophysics through cross-correlations with galaxy surveys.
I...
Abstract: Motivated by Swampland conjectures, I
will present a string theory inspired cosmological model with a
coupled dark sector that evolves with a scalar field. When fitted
to the recent DESI DR2 results (together with the CMB data
and...
Abstract: Quantum information science seeks to
exploit the collective behavior of a large quantum system to enable
tasks that are impossible (or less possible!) with classical
resources alone. This burgeoning field encompasses a variety
of...
Discs of stars around super-massive black holes, like the one at
the Galactic centre, evolve primarily via resonant relaxation,
which is the process governing the evolution of the
angular-momentum vectors of stellar orbits about the
super-massive...
Abstract: The PADME experiment is a
fixed-target high-energy physics setup located in Frascati, Italy,
originally designed to search for dark photon production via
collisions between a positron beam and a thin diamond target. In
2022, the experiment...
Surveys of the mm-wave sky are great resources for astrophysics
and cosmology. Sources that have been studied include solar system
objects, flaring stars, accreting black holes, dusty star forming
galaxies, and galaxy clusters, while cosmological...
Abstract: I discuss a holographic duality
between the SYK model in a double scaling limit and a 2d theory of
quantum cosmology called sine dilaton gravity.
