Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1007/s10948-016-3781-y
Ключевые слова: Bose-Hubbard model, Ultracold gases, Cluster perturbation theory, Density of states, Spectral properties, TRANSITION, SUPERFLUID, INSULATOR, ATOMS
Аннотация: We 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 spПоказать полностьюinless bosons in a square lattice taking into account the short-range correlation.
Журнал: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Выпуск журнала: Vol. 30, Is. 1
Номера страниц: 103-107
ISSN журнала: 15571939
Место издания: NEW YORK
Издатель: SPRINGER