title: Observability of quantum criticality and a continuous supersolid in atomic gases.
abstract: We analyze the Bose-Hubbard model with a three-body hard-core constraint by mapping the system to a theory of two coupled bosonic degrees of freedom. We find striking features that could be observable in experiments, including a quantum Ising critical point on the transition from atomic to dimer superfluidity at unit filling, and a continuous supersolid phase for strongly bound dimers.
authors.affiliation: Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria.
authors.forename: S
authors.initials: S
authors.lastname: Diehl
authors.forename: M
authors.initials: M
authors.lastname: Baranov
authors.forename: A J
authors.initials: AJ
authors.lastname: Daley
authors.forename: P
authors.initials: P
authors.lastname: Zoller