Speaker
Роман Жохов
Описание
Using a nonperturbative approach based on the Cornwall-Jackiw-Tomboulis effective action Γ(S) for composite operators, the phase structure of the (2 + 1)-dimensional Gross-Neveu (GN) and Thirring models is investigated. In GN model there are three possible different mass terms in the model. One is a Hermitian, but two others are non-Hermitian. phase portrait of Thirring model consists of two nontrivial phases with Dirac and Haldane mass terms respectively
