Tackling complex quantum magnets with linked cluster expansions
by
Kai Ronald Schmidt-Hoberg
→
Europe/Zurich
EPFL, Salle 727 du BSP
EPFL, Salle 727 du BSP
Description
We discuss recent developments to describe elementary excitations in complex quantum magnets using linked cluster expansions. To this end a novel white graph expansion is introduced especially well suited for systems with several coupling constants and/or in higher dimensions. Some examples are discussed including the case of the highly frustrated transverse-field Ising model on the three-dimensional swedenborgite lattice.
