Ulrik Thinggaard Hansen, postdoc

Ulrik has both his bacherlor’s and master’s degree from our department. He wrote his bachelor's project with Jan Philip Solovej and his thesis (Conformal Invariance of 2D Lattice Models) with Bergfinnur Durhuus.

He received his PhD in February 2024 from the University of Fribourg in Switzerland with Ioan Manolescu as supervisor.

“My thesis, titled "The Not So Many Phases of the Potts Model", treated a diverse number of problems centered around the random-cluster model, which is a so-called graphical representation of the family of Potts Models, of which the Ising Model is the most famous example. My results include the existence of a line of phase transition when the model is exposed to an external field, rotational invariance of the critical model in two dimensions on all lattices, and a robustness-type result for the phase transition in dimension at least 3,” explains Ulrik. He continues:

“I work in the field of mathematical statistical mechanics, where physical questions about phases of matter are translated into mathematical questions about families of probability measures. A particular interest of mine is the study of the myriad, often surprising, connections between disparate statistical mechanics models. These allow one to attack a given problem from many different angles and such changes of perspectives have often been pivotal in gaining new insights throughout the history of the subject. This is due to the fact that, as far as answering a given question goes, not all perspectives are born equal, and it is of prime importance to find the right model for the right question.”

You can meet Ulrik at the office 04.0.10.