Low-temperature asymptotics of integrable systems in an external field
arXiv:cond-mat/0610409 · doi:10.1088/1751-8113/40/1/001
Abstract
An asymptotic low-temperature expansion is performed for an integrable bosonic lattice model and for the critical spin-1/2 Heisenberg chain in a magnetic field. The results apply to the integrable Bose gas as well. We also comment on a high-temperature expansion of the bosonic lattice model.
17 pages, 2 figures