Dec 9 – 11, 2015
Dipartimento di Fisica, Univ. Bari - INFN Sezione di Bari
Europe/Rome timezone
SM&FT 2015 Computational approaches in Quantum Field Theory, Statistical Mechanics and Complex Systems

Infinite order phase transitions in two-dimensional U(N) and SU(N) spin models.

Dec 11, 2015, 10:00 AM
20m
Aula B

Aula B

Speaker

Volodymyr Chelnokov (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine)

Description

Two dimensional U(N) and SU(N) spin models are studied both analytically and numerically to establish the existence of BKT-like phase transitions. In U(N) case a BKT phase transition is found for any value of N. In SU(N) case two BKT-like transitions appear in the model with an adjoint interaction term, if it is large enough, though in the model without the adjoint term only a first order phase transition is found.

Primary authors

Alessandro Papa (CS) Francesca Cuteri (CS) Oleg Borisenko (Bogolyubov Institute for Theoretical Physics, Academy of Sciences of Ukraine) Volodymyr Chelnokov (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine)

Presentation materials