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paper

Mott Insulators Without Symmetry Breaking

arXiv:cond-mat/0309260 · doi:10.1103/PhysRevLett.92.096401

Abstract

We present theoretical models, in one and two space dimensions, that exhibit Mott insulating ground states at fractional occupations without any symmetry breaking. The Hamiltonians of these models are non-local in configuration space, but local in phase space.