2002/07/31 by Klaus Fabricius, Barry M. McCoy
Physics and Astronomy · #cond-mat.stat-mech #hep-th
published as J.Statist.Phys. 111 (2003) 323 · 12 pages. Final version which will be published in J. Stat. Phys
arxiv created 2002/11/06 · arxiv updated 2009/11/30
We demonstrate that the Q matrix introduced in Baxter's 1972 solution of the eight vertex model has some eigenvectors which are not eigenvectors of the spin reflection operator and conjecture a new functional equation for Q(v) which both contains the Bethe equation that gives the eigenvalues of the transfer matrix and computes the degeneracies of these eigenvalues.