Events at Physics

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Events During the Week of January 8th through January 15th, 2023

Monday, January 9th, 2023

No events scheduled

Tuesday, January 10th, 2023

Winter Recess
Time: 1:00 pm - 1:30 pm
Place: 4274 Chamberlin
Speaker: Sharon Kahn
Abstract: Gather for a 30 min break with some games and hot chocolate in room 4274
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Faculty Search Committee Meeting (PVL 267644)
Time: 1:00 pm - 2:00 pm
Place: 3290A
Speaker: Paul Terry, UW Madison Physics
Abstract: Closed meeting to discuss personnel matters—pursuant to Section 19.85(1)(c) of the Wisconsin Open Meetings Law
Host: Paul Terry
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Wednesday, January 11th, 2023

Physics ∩ ML Seminar
Implicit Regularization in Quantum Tensor Networks
Time: 11:00 am - 12:15 pm
Place: Online Seminar: Please sign up for our mailing list at for zoom link. We will also livestream the talk in Chamberlin 5280.
Speaker: Nadav Cohen, Tel Aviv University
Abstract: The mysterious ability of neural networks to generalize is believed to stem from an implicit regularization, a tendency of gradient-based optimization to fit training data with predictors of low “complexity.” Despite vast efforts, a satisfying formalization of this intuition is lacking. In this talk I will present a series of works theoretically analyzing the implicit regularization in quantum tensor networks, known to be equivalent to certain (non-linear) neural networks. Through dynamical characterizations, I will establish an implicit regularization towards low tensor ranks, different from any type of norm minimization, in contrast to prior beliefs. I will then discuss implications of this finding to both theory (potential explanation for generalization over natural data) and practice (compression of neural network layers, novel regularization schemes). An underlying theme of the talk will be the potential of quantum tensor networks to unravel mysteries behind deep learning. Works covered in the talk were in collaboration with Sanjeev Arora, Wei Hu, Yuping Luo, Asaf Maman and Noam Razin.
Host: Gary Shiu
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Thursday, January 12th, 2023

Cookie potluck
Time: 3:30 pm - 4:30 pm
Place: 4274 Chamberlin
Speaker: Sharon Kahn
Abstract: We invite the bakers out there to bring a batch of your best to share! If you’re not a baker or don’t have time, just come hang out with us for a bit to have a cookie and a cup of hot chocolate. For the bakers, it’d be helpful if you can mark anything that has nuts (we’ll assume most baked goods have butter, eggs and flour).
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Friday, January 13th, 2023

No events scheduled