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On the variational treatment of a class of double-well oscillators

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arxiv 2312.00004 v1 pith:U3KGK6J3 submitted 2023-08-17 quant-ph

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keywords approachclassdouble-wellmethodoscillatorsresultsrrvmssqmgs
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We compare the well known Rayleigh-Ritz variational method (RRVM) with a recently proposed approach based on supersymmetric quantum mechanics and the Gram-Schmidt orthogonalization method (SSQMGS). We apply both procedures to a particular class of double-well harmonic oscillators that had been conveniently chosen for the application of the latter approach. The RRVM eigenvalues converge smoothly from above providing much more accurate results with less computational effort. Present results show that the unproved SSQMGS upper bounds do not hold.

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