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DY: Fachverband Dynamik und Statistische Physik
DY 53: Poster: Quantum Dynamics, Chaos and Information; Many Body Systems
DY 53.11: Poster
Donnerstag, 19. März 2020, 15:00–18:00, P1A
Dynamics of visons in weakly perturbed Kitaev models — •Aprem Joy and Achim Rosch — Institute of Theoretical Physics, University of Cologne, Germany
The Kitaev honeycomb model is a paradigmatic model which realizes a spin liquid phase and is exactly solvable. Candidate materials for Kitaev spin liquids are best described by Kitaev interactions perturbed by other spin exchange couplings which breaks the exact solvability of the model.
We study the dynamics of topological vison excitations coupled to the Majorana fermions in the Kitaev honeycomb model under weak perturbations, e.g., Heisenberg coupling, magnetic field and symmetric-anisotropic (Γ) interactions. The pure Kitaev model can be exactly solved thanks to the underlying static nature of the visons which effectively separates the model into free majoranas hopping in the background of a static Z2 gauge field. But in the presence of perturbations, these visons are no more static but acquire dynamics also modifying the Majorana sector.