Ontology type: schema:ScholarlyArticle Open Access: True
2017-01
AUTHORSKirill Kudashkin, Sergey Nikolaev, Sergey Ovchinnikov
ABSTRACTWe study the two-dimensional ultracold Bose gas in optical lattice. We use cluster perturbation theory based on Hubbard X-operators to calculate the spectral function and phase diagram of Bose-Hubbard model which is minimal model to describe behavior of ultracold gases in optical lattices. We have analyzed spectral properties of spinless bosons in a square lattice taking into account the short-range correlation. More... »
PAGES103-107
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DOIhttp://dx.doi.org/10.1007/s10948-016-3781-y
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