Abstract
We use mathematically rigorous perturbation theory to study the transition between the Mott insulator and the conjectured Bose-Einstein condensate in a hard-core Bose-Hubbard model. The critical line is established to lowest order in the tunneling amplitude.
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Communicated by M. Aizenman
Collaboration supported in part by the Swiss National Science Foundation under grant 2-77344-03.
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Fernández, R., Fröhlich, J. & Ueltschi, D. Mott Transition in Lattice Boson Models. Commun. Math. Phys. 266, 777–795 (2006). https://doi.org/10.1007/s00220-006-0038-9
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DOI: https://doi.org/10.1007/s00220-006-0038-9