Zero-temperature phase transitions in dilute bosonic superfluids on a lattice

Details Zero-temperature phase transitions in dilute bosonic superfluids on a lattice Zero-temperature phase transitions in dilute bosonic superfluids on a lattice

2009-04-30

arxiv.org/abs/0904.4866v1

J. Phys.: Condens. Matter 21 (2009) 245602.

Physics

Condensed Matter

Quantum Gases

22 pages, 1 table, 12 figures, submitted to J. Phys. Cond. Mat

Scientific paper

10.1088/0953-8984/21/24/245602

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.

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