Non-Standard Bose-Hubbard Model with State-Dependent Tunneling (D. González Cuadra)
11:30 - 12:30
Daniel González Cuadra
ICFO - The Institute of Photonic Sciences, Castelldefels, Spain
New Lecture Hall, Room B 0.32
MPQ, Theory Division
Non-standard Bose-Hubbard models are relevant for the study of strongly correlated quantum physics thanks to their rich phase diagram and the possibility to simulate them using ultracold atoms in optical lattices.
In this talk, I will present a
model where the tunnelling coefficient of bosons between neighboring sites
depends on the state of 1/2-spin particles sitting on the links. The phase
diagram is analyzed using DMRG, finding non-trivial phases, including spin wave
insulators and solitonic phases, where the translational invariant symmetry is
broken in different manners. Finally, I will show how this model can be
implemented using ultracold atoms interacting with fixed impurities, which can
be simulated with trapped ions or neutral atoms.