------------------------------------------------------------ Joint Technion and University of Haifa Combinatorics Seminar ------------------------------------------------------------ The next meeting of the Combinatorics Seminar will take place on Wednesday, December 15 in *University of Haifa*. ** NOTICE THE CHANGE IN TIME. FOLLOWING REQUESTS OF SOME OF THE PARTICIPANTS, WE WILL SWITCH TO 13:10 ** Speaker: Toufik Mansour (U. of Haifa) Time: Wednesday, December 15, 13:10 Place: Science and Education Building, room #614 (6'th floor), University of Haifa. Title: Diffusion on an Ising chain with kinks Abstract: We count the number of histories between the two degenerate minimum energy configurations of the Ising model on a chain, as a function of the length n and the number d of kinks that appear above the critical temperature. This is equivalent to counting permutations of length n avoiding certain subsequences depending on d. We give explicit generating functions and compute the asymptotics. The setting considered has a role when describing dynamics induced by quantum Hamiltonians with deconfined quasi-particles. Joint work with Alioscia Hamma and Simone Severini --------------------------------------------------------- Technion Math Net-2 (TECHMATH2) Editor: Michael Cwikel <techm@math.technion.ac.il> Announcement from: Raphael Yuster <raphael.yuster@gmail.com>