Spectra of Quantum Chains without the Yang-Baxter Equation

Details Spectra of Quantum Chains without the Yang-Baxter Equation Spectra of Quantum Chains without the Yang-Baxter Equation

1994-06-10

arxiv.org/abs/cond-mat/9406047v2

Physics

Condensed Matter

30 pages, LaTeX, preprint Bonn HE-94-09 (small LaTeX problems fixed)

Scientific paper

10.1016/0550-3213(94)90163-5

We study one-dimensional reaction-diffusion models described by master equations and their associated two-state quantum Hamiltonians. By choosing appropriate rates, the equations of motion decouple into certain subsets. We solve the first subset which has a close relation to the problem of lattice electrons in an electric field. In this way we obtain $L (L - 1) + 1$ energy levels of a quantum chain with $L$ sites. The corresponding Hamiltonian depends on 7 parameters and does not look integrable using conventional methods. As an application, we compute the dynamical critical exponent of a new type of kinetic Ising model.

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