Events at Physics |
Events During the Week of March 13th through March 20th, 2022
Sunday, March 13th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
- Wisconsin Quantum Institute
- Quantum education open house at APS March Meeting
- Time: 4:00 pm - 7:00 pm
- Place: Visit for more info
- Speaker: various, various
- Abstract: Inviting all educators and members of the community to the Quantum Education Open House, taking place before the 2022 APS March Meeting, to learn about quantum education efforts and workforce development programs. The Open House will include information and demonstrations from a range of programs.
- Host: CQE
Monday, March 14th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
Tuesday, March 15th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
- Network in Neutrinos, Nuclear Astrophysics, and Symmetries (N3AS) Seminar
- Mining the transient sky in the new era of Multi-messenger Astrophysics
- Time: 2:00 pm
- Place: Meeting ID: 912 3071 4547
- Speaker: Raffaella Margutti, UC Berkeley
- Abstract: Astronomical transients are events that appear and disappear in the night sky, and are signposts of catastrophic events in space, including the most extreme stellar deaths, stellar tidal disruptions by supermassive black holes, and mergers of black holes and neutron stars. Thanks to new and improved observational facilities we can now sample the night sky with unprecedented temporal cadence and depth across the electromagnetic spectrum and beyond. This effort has led to the discovery of new types of stellar explosions, revolutionized our understanding of phenomena that we thought we already knew, and enabled the first insights into the physics of neutron star mergers with gravitational waves and light. In this talk I will review some very recent developments that resulted from our new capability to study the Universe utilizing gravitational waves and light. Meeting ID: 912 3071 4547
- Host: A. Baha Balantekin
Wednesday, March 16th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
- Physics ∩ ML Seminar
- BI for AI: Energy conserving descent for optimization
- Time: 11:00 am - 12:15 pm
- Place: Zoom link:
- Speaker: Eva Silverstein, Stanford University
- Abstract: We introduce a novel framework for optimization based on energy-conserving Hamiltonian dynamics in a strongly mixing (chaotic) regime and establish its key properties analytically and numerically. The prototype is a discretization of Born-Infeld dynamics, with a squared relativistic speed limit depending on the objective function. This class of frictionless, energy-conserving optimizers proceeds unobstructed until slowing naturally near the minimal loss, which dominates the phase space volume of the system. Building from studies of chaotic systems such as dynamical billiards, we formulate a specific algorithm with good performance on machine learning and PDE-solving tasks (so far at small scale), including generalization. It cannot stop at a high local minimum and cannot overshoot the global minimum, proceeds faster than GD+momentum in shallow valleys, and predictably finds multiple solutions according to a concrete formula for the measure on phase space which is applicable as a result of the energy conservation. Larger-scale experiments in progress are required to assess its relative performance on ML problems of current interest, along with further theoretical analysis its impact on representation/feature learning. Based on and ongoing work.
Thursday, March 17th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
Friday, March 18th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
- Theory Seminar (High Energy/Cosmology)
- Systematically testing all new physics solutions of the muon g-2 anomaly
- Time: 1:00 pm
- Place: Chamberlin 5280
- Speaker: Rodolfo Capdevilla, Perimiter Institute
- Abstract: The Fermilab Muon g−2 collaboration has recently released its first measurement of (g−2)μ. This result is consistent with previous Brookhaven measurements and together they yield a statistically significant 4.2σ discrepancy with the Standard Model prediction. New physics solutions to (g−2)μ feature light weakly coupled neutral particles or heavy strongly coupled charged particles. In this talk I present an experimental program of existing and proposed experiments that can completely cover the set of theories that explain this anomaly.
- Host: George Wojcik
Saturday, March 19th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*
Sunday, March 20th, 2022
- Academic Calendar
- Spring recess
- Abstract: *Note: actual end time may vary.*