Scientific Projects
Interacting spin waves in quantum antiferromagnets in two dimensions
This project builds on the recent methodological progress for non-perturbative continuous similarity transformations (CSTs) in momentum space, which enables a quantitative understanding of the magnetic excitations and their dynamic correlations of the paradigmatic square-lattice Heisenberg model. The CST maps the strongly correlated quantum many-body problem to an effective model conserving the number of dressed spin waves with strong mutual attractive interactions. We plan to study various unfrustrated two-dimensional Heisenberg models and frustrated ones as well.
see: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 434439878






