Berry curvature of interacting bosons in a honeycomb lattice
Berry curvature of interacting bosons in a honeycomb lattice
We consider soft-core bosons with onsite interaction loaded in the honeycomb lattice with different site energies for the two sublattices. Using both a mean-field approach and quantum Monte-Carlo simulations, we show that the topology of the honeycomb lattice results in a non-vanishing Berry curvature for the band structure of the …