Abstract:
We consider two operators A and A + in a Hilbert space of functions on the exponential lattice , where 0<q<1. The operators are formal adjoints of each other and depend on a real parameter . We show how these operators lead to an essentially unique symmetric ground state ψ0 and that A and A + are ladder operators for the sequence . The sequence (ψ n /ψ0) is shown to be a family of orthogonal polynomials, which we identify as symmetrized q-Laguerre polynomials. We obtain in this way a new proof of the orthogonality for these polynomials. When γ=0 the polynomials are the discrete q-Hermite polynomials of type II, studied in several papers on q-quantum mechanics.
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Received: 6 December 1999 / Accepted: 21 May 2001
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Berg, C., Ruffing, A. Generalized q-Hermite Polynomials. Commun. Math. Phys. 223, 29–46 (2001). https://doi.org/10.1007/PL00005583
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DOI: https://doi.org/10.1007/PL00005583