title: Bose-Einstein condensates in rotating lattices.
abstract: Strongly interacting bosons in a two-dimensional rotating square lattice are investigated via a modified Bose-Hubbard Hamiltonian. Such a system corresponds to a rotating lattice potential imprinted on a trapped Bose-Einstein condensate. Second-order quantum phase transitions between states of different symmetries are observed at discrete rotation rates. For the square lattice we study, there are four possible ground-state symmetries.
authors.affiliation: JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309, USA.
authors.forename: Rajiv
authors.initials: R
authors.lastname: Bhat
authors.forename: M J
authors.initials: MJ
authors.lastname: Holland
authors.forename: L D
authors.initials: LD
authors.lastname: Carr