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Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Supersolid phases in the one-dimensional extended soft-core bosonic Hubbard model
G G Batrouni1, F Hébert, R T Scalettar
1Institut Non-Linéaire de Nice, UMR 6618 CNRS, Université de Nice-Sophia Antipolis, 1361 route des Lucioles, 06560 Valbonne, France.
Abstract:
We present results of quantum Monte Carlo simulations for the soft-core extended bosonic Hubbard model in one dimension exhibiting the presence of supersolid phases similar to those recently found in two dimensions. We find that in one and two dimensions, the insulator-supersolid transition has dynamic critical exponent z = 2 whereas the first order insulator-superfluid transition in two dimensions is replaced by a continuous transition with z = 1 in one dimension. We present evidence that this transition is in the Kosterlitz-Thouless universality class and discuss the mechanism behind this difference. The simultaneous presence of two types of quasi-long-range order results in two solitonlike dips in the excitation spectrum.
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