Nonlinear Sciences – Exactly Solvable and Integrable Systems
Scientific paper
2003-03-18
Phys.Rev.E 66 (2002) 047103
Nonlinear Sciences
Exactly Solvable and Integrable Systems
Latex, 12 pages, 1 figure
Scientific paper
10.1103/PhysRevE.66.047103
In this note we study `a la Baxter [1] the possible integrable manifolds of the asymmetric eight-vertex model. As expected they occur when the Boltzmann weights are either symmetric or satisfy the free-fermion condition but our analysis clarify the reason both manifolds need to share a universal invariant. We also show that the free-fermion condition implies three distinct classes of integrable models.
Galleas Wellington
Martins Marcio J.
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