Abstract.
We study in detail the relationship between the Tavis-Cummings Hamiltonian of quantum optics and a family of quasi-exactly solvable Schrödinger equations. The connection between them is established through the biconfluent Heun equation. We found that each invariant n-dimensional subspace of Tavis-Cummings Hamiltonian corresponds either to n potentials, each with one known solution, or to one potential with n known solutions. Among these Schrödinger potentials the quarkonium and the sextic oscillator appear.
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Mohamadian, T., Negro, J., Nieto, L.M. et al. Tavis-Cummings models and their quasi-exactly solvable Schrödinger Hamiltonians. Eur. Phys. J. Plus 134, 363 (2019). https://doi.org/10.1140/epjp/i2019-12753-4
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DOI: https://doi.org/10.1140/epjp/i2019-12753-4