Zero-temperature phase transitions in dilute bosonic superfluids on a lattice
arXiv:0904.4866 · doi:10.1088/0953-8984/21/24/245602
Abstract
Kinetic energy driven phase transitions in Bose superfluids occur at low values of the repulsion when the values of the next-to-nearest and next-to-next-to-nearest hopping term attain certain critical values, resulting in alterations in the wave vector of the condensate. We map out the space of possible phases allowed by particular forms of the single-particle energy dispersion in the superfluid state, noting the appearance of a new phase, and examine in more detail the effects of additional repulsive terms on the form of the condensate wavefunction. We also examine the effect of these additional hopping terms on the formation of inhomogeneities in the condensate.
22 pages, 1 table, 12 figures, submitted to J. Phys. Cond. Mat
References in corpus (8)
- Quantum Oscillations in the Underdoped Cuprate YBa2Cu4O8
- Shubnikov-de Haas oscillations in YBa_2Cu_4O_8
- State preparation and dynamics of ultracold atoms in higher lattice orbitals
- Exact hydrodynamics of a trapped dipolar Bose-Einstein condensate
- Supersolidity from defect-condensation in the extended boson Hubbard model
- Incommensurate superfluidity of bosons in a double-well optical lattice
- Strong-coupling expansions for the topologically inhomogeneous Bose-Hubbard model
- Coupled two-component atomic gas in an optical lattice