Introduction to the Thermodynamics of Spin Chains
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We review how to obtain the thermodynamic Bethe Ansatz (TBA) equations for the antiferromagnetic Heisenberg ring in an external magnetic field. We review how to solve these equations for low temperature and small field, and calculate the specific heat and magnetic susceptibility.
24 pages (1 figure not included, but available on request) (To appear in the Proceedings of the NSERC-CAP Workshop on Quantum Groups, Integrable Models and Statistical Systems, Kingston, Canada 13 -17 July 1992)
24 pages (1 figure not included, but available on request) (To appear in the Proceedings of the NSERC-CAP Workshop on Quantum Groups, Integrable Models and Statistical Systems, Kingston, Canada 13 -17 July 1992)