Probability Seminar welcomes Jean-Francois Le Gall

TTbar Deformations, S-matrix, and Density of States
Monday, March 15, 2021 - 11:00am to Tuesday, March 16, 2021 - 10:55am
Jean-Francois Le Gall (Univ. of Paris-Saclay)
Abstract / Description: 

Theories in two space-time dimensions provide playground for exploring geometry of the "Theory Space" - the collection of all quantum field theories. Recently introduced "TTbar deformations" of 2D quantum field theories bring insight into the structure of that space. These are special deformations, "irrelevant" in the renormalization group sense and thus likely altering the local structure of the theory. At the same time, the TTbar deformations generate robust and even solvable theories. Of special interest are the deformations of integrable field theories, where they can be related to deformations of the associated factorizable S-matrix, and the theory can be treated using the powerful tool of the Thermodynamic Bethe ansatz. Preliminary results suggest that the deformed theories typically develop Hagedorn-like density of states, similar to that in the string theories.



The Probability Seminars for Winter Quarter will be held online via Zoom at 11am on Mondays. Please note that these events will be locked by the Host after ten minutes, so latecomers will not be able to join the Meeting. Subscribe to our distribution list to receive Meeting IDs and passwords via email.