Supersolids in confined fermions on one-dimensional optical lattices
arXiv:cond-mat/0608491 · doi:10.1103/PhysRevB.75.161104
Abstract
Using quantum Monte Carlo simulations, we show that density-density and pairing correlation functions of the one-dimensional attractive fermionic Hubbard model in a harmonic confinement potential are characterized by the anomalous dimension of a corresponding periodic system, and hence display quantum critical behavior. The corresponding fluctuations render the SU(2) symmetry breaking by the confining potential irrelevant, leading to structure form factors for both correlation functions that scale with the same exponent upon increasing the system size, thus giving rise to a (quasi)supersolid.
arXiv comment4 pages, 5 figures, published version
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