2006/10/31 by S. Lerma H., B. Errea
Chemistry · Mathematics · Physics and Astronomy · #Algebraic structures and combinatorial models #Molecular spectroscopy and chirality #Nonlinear Waves and Solitons #nlin.SI
paper · pdf · doi:10.1088/1751-8113/40/15/005
published as Journal of physics A: mathematical and theoretical, 40, 15, 4125-4140 (2007) · Revised version. To appear in Jour. Phys. A: Math. and Theor
arxiv created 2007/03/16 · openalex publication_date 2007/03/23 · arxiv updated 2014/02/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We present the exact solution of the Richardson–Gaudin models associated with the SU (3) Lie algebra. The derivation is based on a Gaudin algebra valid for any simple Lie algebra in the rational, trigonometric and hyperbolic cases. For the rational case additional cubic integrals of motion are obtained, whose number is added to that of the quadratic ones to match, as required from the integrability condition, the number of quantum degrees of freedom of the model. We discuss different SU (3) physical representations and elucidate the meaning of the parameters entering in the formalism. By considering a bosonic mapping limit of one of the SU (3) copies, we derive new integrable models for three level systems interacting with two bosons. These models include a generalized Tavis–Cummings model for three level atoms interacting with two modes of the quantized electric field.