Twisted superfluid phase in the extended one-dimensional Bose-Hubbard model

Abstract

In one-dimensional systems a twisted superfluid phase is found which is induced by a spontaneous breaking of the time-reversal symmetry. Using the density-matrix renormalization group allows us to show that the excitation energy gap closes exponentially causing a quasi-degenerate ground state. The two degenerate ground states are connected by the time-reversal symmetry which manifests itself in an alternating complex phase of the long-range correlation function. The quantum phase transition to the twisted superfluid is driven by pair tunneling processes in an extended Bose-Hubbard model. The phase boundaries of several other phases are discussed including a supersolid, a pair superfluid, and a pair supersolid phase as well as a highly unconventional Mott insulator with a degenerate ground state and a staggered pair correlation function.

5 pages

References in corpus (14)

• Non-standard Hubbard models in optical lattices: a review
• Orbital superfluidity in the $P$-band of a bipartite optical square lattice
• Hidden order in 1D Bose insulators
• Supersolids versus phase separation in two-dimensional lattice bosons
• Phase diagram of the extended Bose Hubbard model
• Supersolid phases in the one dimensional extended soft core Bosonic Hubbard model
• Unconventional Bose-Einstein Condensations Beyond the "No-node" Theorem
• Extended Bose Hubbard model of interacting bosonic atoms in optical lattices: from superfluidity to density waves
• Phase Diagram of Interacting Bosons on the Honeycomb Lattice
• Creating a supersolid in one-dimensional Bose mixtures
• Twisted complex superfluids in optical lattices
• Chiral spin superfluidity and spontaneous spin Hall effect of interacting bosons
• Beyond mean-field study of a binary bosonic mixture in a state-dependent honeycomb lattice
• Symmetry-broken momentum distributions induced by matter-wave diffraction during time-of-flight expansion of ultracold atoms

Cited by in corpus (13)

• Staggered superfluid phases of dipolar bosons in two-dimensional square lattices
• Formation of spontaneous density-wave patterns in DC driven lattices
• Superfluid phases induced by the dipolar interactions
• Mean-field phases of an ultracold gas in a quasicrystalline potential
• Floquet-engineered nonlinearities and controllable pair-hopping processes: From optical Kerr cavities to correlated quantum matter
• Floquet engineering of optical nonlinearities: a quantum many-body approach
• Generating accessible entanglement in bosons via pair-correlated tunneling
• Staggered Ground States in an Optical Lattice
• Staggered quantum phases of dipolar bosons at finite temperatures
• Twisted superfluid and supersolid phases of triplons in bilayer honeycomb magnets
• Exotic Superfluid with Emergent flux in a one-dimensional Bose-Fermi mixture
• Fate of chiral order and impurity self-pinning in flat bands with local symmetry
• Miscibility-Immiscibility transition of strongly interacting bosonic mixtures in optical lattices