Vortrag von Prof. Dr. Daniel Ueltschi
Datum: 22.11.23 Zeit: 17.15 - 18.45 Raum: Y27H12
Onsager proposed a closed-form expression of the free energy of the Ising model in 1944. The method of Kac and Ward is particularly elegant and it has recently be made rigorous by Lis and Aizenman-Warzel. I will show how to extend it to the triangular lattice, with coupling constants of arbitrary signs.
This is ongoing work with Georgios Athanasopoulos.