| May 2023 |
| Monday | Tuesday | Wednesday | Thursday | Friday |
| 1 Xuyao Hu, The Sachdev-Ye-Kitaev model and turbulence (12:30 PM - 1:30 PM) , Grad Pheno Journal Club (2:00 PM - 3:00 PM) | 2 Austin McDowell, Constraining GRB Properties with Afterglow Light Curves (10:30 AM - 12:00 PM) + Abstract: , Astro Journal Club (12:30 PM - 1:30 PM) (2:00 PM - 3:15 PM) | 3 , HEP Journal Club (12:30 PM - 1:30 PM) Linda Xu, The continuum and the line: new analyses of Fermi gamma-ray data (2:00 PM - 3:00 PM) + Abstract: | 4 , Equity & Inclusion Committee (12:30 PM - 2:00 PM) Dave Thirumalai, Collective Movement in cells - From jamming to superdiffusion (4:00 PM - 5:15 PM) | 5 Nicolas Boulanger, New higher-spin topological systems in 3D (2:00 PM - 3:15 PM) + Abstract: Zare (3:30 PM - 5:30 PM) |
| 8 Francis Bernardeau, Nulling properties of tomographic cosmic shear observations (2:00 PM - 3:15 PM) + Abstract: | 9 Michael Unger, New Models of the Magnetic Field of the Galaxy (2:00 PM - 3:00 PM) + Abstract: | 10 Dam Thanh Son, Bosonization of Fermi surfaces and coadjoint orbits (2:00 PM - 3:00 PM) + Abstract: | 11 , Equity & Inclusion Committee (12:30 PM - 2:00 PM) Yue Hu, Characterizing 3D Galactic Magnetic Fields with Anisotropic MHD turbulence (12:30 PM - 1:00 PM) + Abstract: | 12 Benedikt Schosser, 21cm Parameter Inference (11:00 AM - 11:45 AM) + Abstract: Burt Ovrut, Realistic Heterotic Vacua, Inflation and FIMP Dark Matter (2:00 PM - 3:15 PM) + Abstract: Zare (3:30 PM - 5:30 PM) |
| 15 Xingyang Yu, Dualities and Symmetries of Quantum Field Theories from Brane Engineering (2:00 PM - 4:00 PM) + Abstract: | 16 | 17 Laurent Baulieu, Gravitons, BRST-BMS4 Symmetry and its Cocycles from Horizontality Conditions (1:00 PM - 2:15 PM) -- Abstract: The BRST structure of the extended Bondi-Metzner-Sachs symmetry group of asymptotically flat manifolds is studied using the recently introduced framework of Beltrami field parametrization of four-dimensional metrics. The latter has interesting properties. In particular, it allows to geometrically define as fundamental fields the two physical degrees of freedom of asymptotic perturbative gravitons of asymptotically flat spaces. They are identified as excitations of the Beltrami differential of the asymptotic celestial sphere, enabling quite suggestive formula for the memory effect. The graded BRST BMS4 nilpotent differential operator that classically define the BMS symmetry transformations is actually based on four horizontality conditions. A number of BRST BMS4 cocycles can then be found, connected by descent equations. This indicates the possibility of anomalies for three-dimensional Lagrangian theories possibly built from the principle of BRST-BMS4 invariance in the null boundaries $cal I ^pm$ of asymptotically flat spaces. Remarkably, the BMS anomaly cocycle $delta^1_3$ has a simplest and natural expression. Its descendants, $delta^2_2$ that can be associated with the occurrence of a central charge in Hamiltonian formalism, $delta^3_1$ and $delta^4_0$ have much less suggestive expressions that encode some subtilities of the four dimensional nature of the BMS4 symmetry. | 18 | 19 Zare (3:30 PM - 5:30 PM) |
| 22 | 23 Zihui Wang, New topics in quantum chromodynamics and astro-particle probes of dark matter (10:00 AM - 12:00 PM) + Abstract: | 24 | 25 Xingchen Xu, Non-perturbative Interactions Between Dark Matter and Baryons: Scattering, Capture, and Experimental Constraints (9:00 AM - 11:00 AM) + Abstract: John Davis, Observations spanning multiple astronomical scales point to the existence of an unknown form of matter (11:00 AM - 12:15 PM) + Abstract: Zare (2:00 PM - 4:00 PM) Ben Wandelt, AI-Driven Discoveries at the Frontiers of Cosmology (4:00 PM - 5:15 PM) + Abstract: | 26 |
| 29 | 30 | 31 Kate Storey-Fisher, Tools for Large-Scale Structure and Galaxy Formation (12:30 PM - 2:00 PM) + Abstract: | 1 | 2 |