Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2002-12-13
J. Math. Phys. 43 5060 (2002)
Physics
Condensed Matter
Statistical Mechanics
26 pages
Scientific paper
The XXX Heisenberg model is studied at finite temperature. The free energy is
derived without recourse to Thermal Bethe Ansatz method and Quantum Transfer
Matrix method. The result perfectly agrees with the free energy derived by
Thermal Bethe Ansatz method. An explicit expression of the cluster expansion
coefficient in arbitrary order is presented for the first time.
Kato Go
Wadati Miki
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