Phase diagrams of the Bose-Hubbard model at finite temperature

• Published in: Condensed Matter Physics
• Date: 2009
• Main Authors: Stasyuk, I.V., Mysakovych, T.S.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2009
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/120322
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Phase diagrams of the Bose-Hubbard model at finite temperature / I.V. Stasyuk, T.S. Mysakovych // Condensed Matter Physics. — 2009. — Т. 12, № 4. — С. 539-546. — Бібліогр.: 15 назв. — англ.

The phase transitions in the Bose-Hubbard model are investigated. A single-particle Green's function is calculated in the random phase approximation and the formalism of the Hubbard operators is used. The regions of existence of the superfluid and Mott insulator phases are established and the...