Events at Physics |
Events During the Week of April 17th through April 24th, 2022
Monday, April 18th, 2022
- No events scheduled
Tuesday, April 19th, 2022
- No events scheduled
Wednesday, April 20th, 2022
- Physics ∩ ML Seminar
- Effective Theory of Deep Neural Networks
- Time: 11:00 am - 12:15 pm
- Place: Online Seminar: Please sign up for our mailing list at www.physicsmeetsml.org for zoom link. We will also livestream the talk in Chamberlin 5280.
- Speaker: Sho Yaida, Meta AI
- Abstract: Large neural networks perform extremely well in practice, providing the backbone of modern machine learning. The goal of this talk is to provide a blueprint for theoretically analyzing these large models from first principles. In particular, we’ll overview how the statistics and dynamics of deep neural networks drastically simplify at large width and become analytically tractable. In so doing, we’ll see that the idealized infinite-width limit is too simple to capture several important aspects of deep learning such as representation learning. To address them, we’ll step beyond the idealized limit and systematically incorporate finite-width corrections.
Thursday, April 21st, 2022
- No events scheduled
Friday, April 22nd, 2022
- Wisconsin Quantum Institute
- Center for Molecular Quantum Transduction: Second Annual Symposium
- Time: 9:00 am - 4:30 pm
- Place:
- Speaker: Various, Various
- Abstract: See for details
- Host: Center for Molecular Quantum Transduction
- Theory Seminar (High Energy/Cosmology)
- Searching for Axion Conversion with the Breakthrough Listen GBT Galactic Center Survey
- Time: 1:00 pm
- Place: Chamberlin 5280
- Speaker: Joshua Foster, MIT
- Abstract: The efficient conversion of axion to radio-band photons in neutron star magnetospheres provides a tantalizing opportunity to search for micro-eV axion dark matter through indirect means with existing and upcoming telescopes. We search for evidence of this conversion process using archival Green Bank Telescope data collected in a survey of the Galactic Center in the C-Band by the Breakthrough Listen project. While Breakthrough Listen aims to find signatures of extraterrestrial life in the radio band, their high-frequency resolution spectral data of the Galactic Center region is ideal for searching for the quasi-monochromatic radio spectral lines of axion conversion. Using state-of-the-art ray-tracing simulations and data-driven models of the neutron star population in the inner pc of the galaxy, we make use of 280 minutes of observations of the inner GC to search for axion DM, finding no evidence for a signal and setting leading constraints on the axion-photon coupling for masses between 15 and 35 micro-eV.
- Physics Department Colloquium
- Physics Department Climate Survey Results
- Time: 3:30 pm - 4:30 pm
- Place: 2103 Chamberlin Hall -
- Speaker: Prof. Tulika Bose, UW-Madison, Department of Physics
- Host: Mark Eriksson