Theorie Kolloquium | February 06, 16:30
Well-understood and ill-understood universality classes of absorbing state phase transitions
In this talk, various universality classes found in absorbing phase transitions will be reviewed. Starting from the contact process, the directed percolation (DP) universality class and a possible classification scheme known as the DP conjecture will be discussed. The DP conjecture states that a model system without nontrivial symmetry and/or conservation laws and with a single order parameter field should belong to the DP class. Other universality classes have been found by breaking some of the requisites of the DP conjecture, which will be briefly discussed. Particular focus of this talk will be on a controversy around the universality class to which the pair contact process with diffusion (PCPD) should belong. Two conflicting viewpoints and their supporting arguments will be reviewed. Endeavors to settle down this controversy will be discussed.
Su-Chan Park, Catholic University of Korea
Seminar Room TP 0.03
Contact: not specified