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arXiv:hep-th/9703026 · Nuclear Physics B

Thermodynamic Bethe ansatz for the subleading magnetic perturbation of the tricritical Ising model

R.M. Ellem, V.V. Bazhanov

Published Feb 1, 1998• 8 citations
arXivHTMLPDF
DOI
10.1016/s0550-3213(97)00748-7

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Abstract The Thermodynamic Bethe Ansatz (TBA) allows us to study finite size and finite temperature effects of an integrable model. This chapter investigates the integral equations that determine the free energy and gives their physical interpretation. It discusses Casimir energy, Bethe relativistic wave function, the derivation of thermodynamics, the meaning of pseudo-energy (dressed energy and momentum), infrared and ultraviolet limits, the coefficient of bulk energy, the general form of the TBA equations, the thermodynamics of the free field theories, L-channel quantization and the LeClair–Mussardo formula. It also covers the application of the Yang–Lee S-matrix, the magnetic field Ising model, and the tricritical Ising model.