Direct Calculation of Thermodynamic Quantities for Heisenberg Model

Details Direct Calculation of Thermodynamic Quantities for Heisenberg Model Direct Calculation of Thermodynamic Quantities for Heisenberg Model

2002-12-13

arxiv.org/abs/cond-mat/0212325v1

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.

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