Events at Physics |
Events on Wednesday, July 29th, 2020
- Thesis Defense
- Cosmic Ray Transport and the Galaxy Gas Cycle
- Time: 10:00 am - 11:00 am
- Place: Virtual
- Speaker: Chad Bustard, Physics PhD Graduate Student
- Abstract: Meeting ID: 871 8195 0560 Password: 845382
- Host: Ellen Zweibel, Faculty Advisor
- Physics ∩ ML Seminar
- Discovering Symbolic Models in Physical Systems using Deep Learning
- Time: 11:00 am - 12:00 pm
- Place: Please register for this online event:
- Speaker: Shirley Ho, Flatiron Institute
- Abstract: We develop a general approach to distill symbolic representations of a learned deep model by introducing strong inductive biases. We focus on Graph Neural Networks (GNNs). The technique works as follows: we first encourage sparse latent representations when we train a GNN in a supervised setting, then we apply symbolic regression to components of the learned model to extract explicit physical relations. We find the correct known equations, including force laws and Hamiltonians, can be extracted from the neural network. We then apply our method to a non-trivial cosmology example—a detailed dark matter simulation—and discover a new analytic formula that can predict the concentration of dark matter from the mass distribution of nearby cosmic structures. The symbolic expressions extracted from the GNN using our technique also generalized to out-of-distribution-data better than the GNN itself. Our approach offers alternative directions for interpreting neural networks and discovering novel physical principles from the representations they learn.
- Host: Shiu
- Chicago Quantum Exchange Briefing
- Quantum simulations of materials on near-term quantum computers
- Time: 11:00 am - 12:00 pm
- Place: Virtual; please email quantum@uchicago.edu to request access
- Speaker: Marco Govoni, Argonne National Laboratory
- Abstract: Citation: Quantum simulations of materials on near-term quantum computers.
If you are a CQE member or corporate partner and would like to access these events, contact quantum@uchicago.edu