Strongly interacting bosons in a 1D optical lattice at incommensurate densities

Abstract

We investigate quantum phase transitions occurring in a system of strongly interacting ultracold bosons in a 1D optical lattice. After discussing the commensurate-incommensurate transition, we focus on the phases appearing at incommensurate filling. We find a rich phase diagram, with superfluid, supersolid and solid (kink-lattice) phases. Supersolids generally appear in theoretical studies of systems with long-range interactions; our results break this paradigm and show that they may also emerge in models including only short-range (contact) interactions, provided that quantum fluctuations are properly taken into account.

References in corpus (7)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Bosonizing one-dimensional cold atomic gases
• Pinning quantum phase transition for a Luttinger liquid of strongly interacting bosons
• Supersolids versus phase separation in two-dimensional lattice bosons
• Creating a supersolid in one-dimensional Bose mixtures
• Supersolid phases of dipolar bosons in optical lattices with a staggered flux

Cited by in corpus (8)

• Competing Supersolid and Haldane Insulator phases in the extended one-dimensional bosonic Hubbard model
• Competing phases, phase separation and co-existence in the extended one-dimensional bosonic Hubbard model
• Simulating a quantum commensurate-incommensurate phase transition using two Raman coupled one dimensional condensates
• Orthogonality catastrophe and fractional exclusion statistics
• Spin Localization of a Fermi Polaron in a Quasirandom Optical Lattice
• Strongly interacting one-dimensional bosons in arbitrary-strength optical lattices: from Bose-Hubbard to sine-Gordon and beyond
• Identifying strongly correlated supersolid states on the optical lattice by quench-induced π-states
• Commensurate and incommensurate 1D interacting quantum systems