Seminarium Fizyki Materii Skondensowanej

Topologically ordered phases of matter, which fall beyond the Landau paradigm of phases and phase transitions, are especially hard to analyze due to degeneracy of the ground state and no local order parameter. In my talk I will introduce theories aiming at classifying topologically ordered states and novel numerical approaches, tensor networks, to determine both Abelian and non-Abelian topological order starting from a lattice Hamiltonian.