Two-state Bose-Hubbard model in the hard-core boson limit

• Published in: Condensed Matter Physics
• Date: 2011
• Main Authors: Stasyuk, I.V., Velychko, O.V.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2011
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/119899
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Two-state Bose-Hubbard model in the hard-core boson limit / I.V. Stasyuk, O.V. Velychko // Condensed Matter Physics. — 2011. — Т. 14, № 1. — С. 13004: 1-14. — Бібліогр.: 40 назв. — англ.

Phase transition into the phase with Bose-Einstein (BE) condensate in the two-band Bose-Hubbard model with the particle hopping in the excited band only is investigated. Instability connected with such a transition (which appears at excitation energies δ <|t′₍₎|, where |t′₍₎| is the particle hopp...