R. Yue et T. Deguchi, MAGNETIC-SUSCEPTIBILITY AND LOW-TEMPERATURE SPECIFIC-HEAT OF THE INTEGRABLE ONE-DIMENSIONAL HUBBARD-MODEL UNDER OPEN-BOUNDARY CONDITIONS, Journal of physics. A, mathematical and general, 30(23), 1997, pp. 8129-8138
The magnetic susceptibility and the low-temperature specific heat of t
he one-dimensional Hubbard model under the integrable open-boundary co
nditions are discussed through the Bethe ansatz with the string hypoth
esis. The contributions of the boundary fields to both the susceptibil
ity and the specific heat are obtained, and their exact expressions ar
e analytically derived.