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Pushing the frontiers of gravitational encounters and collisionless dynamics
The long range nature of gravity complicates the dynamics of self-gravitating many-body systems such as galaxies and dark matter (DM) halos. Relaxation/equilibration of perturbed galaxies and cold dark matter halos...
Nov 22, 2022
Cosmology and astrophysics with the extragalactic light: background and fluctuations
Cosmology and astrophysics with the extragalactic light: background and fluctuations Abstract: The aggregate light emitted by all extragalactic sources can be measured either as an absolute intensity or through its...
Oct 18, 2022
Integrable line defects and 4d Chern-Simons theory
I discuss an application of a recent construction of 2d integrable field theories from 4d Chern-Simons theory by Costello and Yamazaki. After a review of the construction, I consider integrable...
Oct 17, 2019
Dark Matter in the Era of Gaia
Dark Matter in the Era of Gaia
Oct 22, 2019
Gabriela González, Louisiana State University
Albert Einstein predicted a century ago the existence of gravitational waves – ripples in the fabric of spacetime moving at the speed of light. It was believed that these ripples...
Oct 23, 2019
Equivariant localization and Atiyah-Segal completion for Hochschild and cyclic homology
There is a close relationship between derived loop spaces, a geometric object, and Hochschild homology, a categorical invariant, made possible by derived algebraic geometry, thus allowing for both intuitive insights...
Oct 24, 2019
Cosmology with Massive Neutrinos
Ghostly neutrino particles continue to bring surprises to fundamental physics, from their existence to the phenomenon of neutrino oscillation which implies that their masses are nonzero. Their exact masses, among...
Oct 29, 2019
3D Mirror Symmetry and HOMFLY-PT Homology
A recent construction of HOMFLY-PT knot homology by Oblomkov-Rozansky has its physical origin in “B-twisted” 3D N=4 gauge theory, with adjoint and fundamental matter. Mathematically, the construction uses certain categories...
Oct 31, 2019
New probes of fundamental physics: Utilising small-scale signatures in the Universe.
The influx of new and high-quality cosmological data from upcoming cosmic microwave background (CMB) and large-scale structure surveys will provide unique and exciting opportunities to study the fundamental constituents of...
Nov 05, 2019
Bridgeland stability conditions relative to a boundary
In this talk I will present a construction of relative Bridgeland stability conditions that appeared in my work on stability of topological Fukaya categories of surfaces. This construction gives a...
Nov 07, 2019