TY - GEN
T1 - Effect of quantum correction in the Bose-Hubbard model
AU - Matsumoto, Hideki
AU - Takahashi, Kiyoshi
AU - Ohashi, Yoji
PY - 2006/12/1
Y1 - 2006/12/1
N2 - 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.
AB - 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.
KW - Bose-Einstein condensation
KW - Bose-Hubbard model
KW - Strongly correlated particle system
KW - Superfluid-insulator transition
UR - http://www.scopus.com/inward/record.url?scp=33947515600&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33947515600&partnerID=8YFLogxK
U2 - 10.1063/1.2354603
DO - 10.1063/1.2354603
M3 - Conference contribution
AN - SCOPUS:33947515600
SN - 0735403473
SN - 9780735403475
T3 - AIP Conference Proceedings
SP - 53
EP - 54
BT - LOW TEMPERATURE PHYSICS
T2 - LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Y2 - 10 August 2006 through 17 October 2006
ER -