2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28768The hamiltonian of an asymmetric diffusion process with injection and ejection of particles at the ends of a chain of finite length is known to be relevant to that of the spin-1/2 XXZ chain with integrable boundary terms. However, the inclusion of boundary sources and sinks of particles breaks the arrow-reversal symmetry necessary for solution via the usual Bethe Ansatz approach. Developments in solving the model in the absence of arrow-reversal symmetry are discussed.5 pages, talk given at the 22nd International Colloqium for Group Theoretical Methods in Physics, Hobart, July 1998Statistical Mechanicstext