Speaker
Björn Sbierski
(LMU)
Description
Frustrated three-dimensional quantum magnets bear a rich phenomenology but are notoriously hard to treat theoretically. We show how a SO(3) Majorana representation of spin operators, in combination with the functional renormalization group allows for quantitative simulations at finite temperatures. Focusing on Heisenberg magnets, we establish a finite-size scaling approach and extract critical temperatures and -exponents. For the Pyrochlore lattice, we discuss the improvements introduced by two-loop contributions in the flow equations. We also extend the formalism towards the Kitaev spin representation which is instrumental for the simulation of Rydberg atom arrays.
Primary author
Björn Sbierski
(LMU)
