Abstract
We review three examples of quasi-exactly solvable Hamiltonians which possess multiple algebraisations. This includes the most prominent example, the Lamé equation, as well as recently studied many-body Hamiltonians with Weierstrass interaction potential and, finally, a 2×2 coupled channel Hamiltonian.
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Brihaye, Y., Hartmann, B. Quasi-exactly Solvable (QES) Equations with Multiple Algebraisations. Czechoslovak Journal of Physics 53, 993–998 (2003). https://doi.org/10.1023/B:CJOP.0000010523.47034.3f
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DOI: https://doi.org/10.1023/B:CJOP.0000010523.47034.3f