Browsing by Author "Maier, T. A."

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    Disordered Supersolids in the Extended Bose-Hubbard Model
    Lin, Fei; Maier, T. A.; Scarola, Vito W. (Nature, 2017-10-06)
    The extended Bose-Hubbard model captures the essential properties of a wide variety of physical systems including ultracold atoms and molecules in optical lattices, Josephson junction arrays, and certain narrow band superconductors. It exhibits a rich phase diagram including a supersolid phase where a lattice solid coexists with a superfluid. We use quantum Monte Carlo to study the supersolid part of the phase diagram of the extended Bose-Hubbard model on the simple cubic lattice. We add disorder to the extended Bose-Hubbard model and find that the maximum critical temperature for the supersolid phase tends to be suppressed by disorder. But we also find a narrow parameter window in which the supersolid critical temperature is enhanced by disorder. Our results show that supersolids survive a moderate amount of spatial disorder and thermal fluctuations in the simple cubic lattice.
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    Strengthening Supersolids with Disorder in the Extended Bose-Hubbard Model
    Lin, F.; Maier, T. A.; Scarola, Vito W. (2015)