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DY: Fachverband Dynamik und Statistische Physik

DY 66: Poster: Stat. Phys. (Gen., Critical Phen., Biol.)

DY 66.20: Poster

Thursday, March 15, 2018, 15:30–18:00, Poster A

Critical exponents from a Landau-like approach — •Sören Sanders — Carl von Ossietzky Universität, Oldenburg, Deutschland

Landau’s approach to continuous phase transitions provides an effective theory for the description around the critical point but falls short in correctly establishing non-trivial critical exponents. Using the example of the Mott-insulator to superfluid transition of the Bose-Hubbard model, we derive from the microscopic properties a Landau-like description not restricted by this limitation and correctly reproduce the best known value for the critical exponent β of the XY-universality class.