Effect of quantum correction in the Bose-Hubbard model

Hideki Matsumoto, Kiyoshi Takahashi, Yoji Ohashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Effects of quantum correction in the Bose-Hubbard model at finite temperature are investigated for a homogeneous atomic Bose gas in an optical lattice near its superfluid-insulator transition. Starting from a strong coupling limit, higher order quantum corrections due to the hopping interaction is included in a local approximation (a dynamical mean field approximation) of the non-crossing approximation. When the upper or lower Hubbard band approaches zero energy, there appears a shallow band in the middle of the Hubbard gap due to a strong correlation in the system.

Original languageEnglish
Title of host publicationLOW TEMPERATURE PHYSICS
Subtitle of host publication24th International Conference on Low Temperature Physics - LT24
Pages53-54
Number of pages2
DOIs
Publication statusPublished - 2006 Dec 1
Externally publishedYes
EventLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States
Duration: 2006 Aug 102006 Oct 17

Publication series

NameAIP Conference Proceedings
Volume850
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherLOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
CountryUnited States
CityOrlando, FL
Period06/8/1006/10/17

Keywords

  • Bose-Einstein condensation
  • Bose-Hubbard model
  • Strongly correlated particle system
  • Superfluid-insulator transition

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Matsumoto, H., Takahashi, K., & Ohashi, Y. (2006). Effect of quantum correction in the Bose-Hubbard model. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 (pp. 53-54). (AIP Conference Proceedings; Vol. 850). https://doi.org/10.1063/1.2354603