Monday, April 1, 2013

1303.7272 (Tigran A. Sedrakyan et al.)

Absence of Bose condensation in certain frustrated lattices    [PDF]

Tigran A. Sedrakyan, Leonid I. Glazman, Alex Kamenev
We study hard-core bosons on a class of frustrated lattices with the lowest Bloch band having a degenerate minimum along a closed contour in the reciprocal space. We suggest that the ground state of the system is given by non-condensed state, which may be viewed as a state of fermions subject to Chern-Simons gauge field. At fixed density of bosons, such a state exhibits domains of incompressible liquids. Their fixed densities are given by fractions of the reciprocal area enclosed by the minimal energy contour.
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