Thermodynamics of the Complex su(3) Toda Theory

Details Thermodynamics of the Complex su(3) Toda Theory Thermodynamics of the Complex su(3) Toda Theory

2000-03-23

arxiv.org/abs/hep-th/0003217v2

Phys.Lett. B481 (2000) 419-426

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, 2 figures; some minor changes; accepted for publication in Phys. Lett. B

Scientific paper

10.1016/S0370-2693(00)00495-0

We present the first computation of the thermodynamic properties of the complex su(3) Toda theory. This is possible thanks to a new string hypothesis, which involves bound states that are non self-conjugate solutions of the Bethe equations. Our method provides equivalently the solution of the su(3) generalization of the XXZ chain. In the repulsive regime, we confirm that the scattering theory proposed over the past few years - made only of solitons with non diagonal S-matrices - is complete. But we show that unitarity does not follow, contrary to early claims, eigenvalues of the monodromy matrix not being pure phases. In the attractive regime, we find that the proposed minimal solution of the bootstrap equations is actually far from being complete. We discuss some simple values of the couplings, where, instead of the few conjectured breathers, a very complex structure (involving E_6, or two E_8) of bound states is necessary to close the bootstrap.

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