### Speaker

Edward Frenkel
(UC Berkeley)

### Description

Richard Feynman's last blackboard at Caltech contains a number of tantalizing inscriptions about Bethe Ansatz in quantum integrable models, which fascinated him in the last years of his life. After reviewing some basic examples, I will present a modern perspective on the subject, linking it to dualities in QFT and String Theory, as well as the Langlands duality in mathematics. I will then discuss some recent developments that lend support to Feynman's intuition that these ideas could be useful in the study of 4d gauge theory, and formulate some open questions.

### External references

- 23070020
- a6ca0fa3-73b7-4e4d-af0e-1dd470483fea
- 7fd2cb45-08f9-4c25-83a3-3e330c771c5c