Events at Physics

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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
Place: Online Seminar: Please sign up for our mailing list at 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.
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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
Speaker: Various, Various
Abstract: See for details
Host: Center for Molecular Quantum Transduction
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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.
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Physics Department Colloquium
Physics Department Climate Survey Results
Time: 3:30 pm
Place: 2103 Chamberlin Hall -
Speaker: Prof. Tulika Bose, UW-Madison, Department of Physics
Host: Mark Eriksson
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