Institute for Quantum Physics
Institute for
Quantum Physics
Quantum Physics
Orbitals are everywhere
13 March 2012
Photo: AG Sengstock
A particle occupies a single orbital, so one would assume. This simple picture fails if the particles interact, as is the case for bosons or multi-component fermions. Nonetheless, lattice models are restricted to single orbitals since the full incorporation of the infinite orbital degree of freedom is not feasible. We show how the switching to a “multi-orbitally dressed band” solves this problem. As a consequence, interactions and tunneling processes are renormalized in an occupation-dependent fashion...
