Kinetic quantum phase transition in bosonic superfluids on a lattice

Details Kinetic quantum phase transition in bosonic superfluids on a lattice Kinetic quantum phase transition in bosonic superfluids on a lattice

2008-12-10

arxiv.org/abs/0812.1977v2

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures. Submitted to Physical Review Letters Revised version has additional results and a clarification regarding

Scientific paper

It has been well known that quantum fluctuations induce a macroscopic phase transition from a superfluid to a Mott insulator phase driven by the repulsive potential energy in the ground state of dense bosonic systems on a lattice. We find a quantum phase transition from the homogeneous to an inhomogeneous Bose-condensate strongly affected or sometimes driven by the kinetic energy dispersion in dilute bosonic superfluids, which provides a clear identification of the superfluid state.

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