Stochastic Reaction-Diffusion Processes, Operator Algebras and Integrable Quantum Spin Chains

Details Stochastic Reaction-Diffusion Processes, Operator Algebras and Integrable Quantum Spin Chains Stochastic Reaction-Diffusion Processes, Operator Algebras and Integrable Quantum Spin Chains

1996-01-19

arxiv.org/abs/cond-mat/9601081v1

Physics

Condensed Matter

11 pages, LATEX. Invited lecture given at the Satellite Meeting to Statphys 19 on Statistical Models, Yang-Baxter Equation and

Scientific paper

We show that the stochastic dynamics of a large class of one-dimensional interacting particle systems may be presented by integrable quantum spin Hamiltonians. Using the Bethe ansatz and similarity transformations this yields new exact results. In a complementary approach we generalize previous work and present a new description of these and other processes and the related quantum chains in terms of an operator algebra with quadratic relations. The full solution of the master equation of the process is thus turned into the problem of finding representations of this algebra. We find a two-dimensional time-dependent representation of the algebra for the symmetric exclusion process with open boundary conditions. We obtain new results on the dynamics of this system and on the eigenvectors and eigenvalues of the corresponding quantum spin chain, which is the isotropic Heisenberg ferromagnet with non-diagonal boundary fields.

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