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quant-ph2005★ 18 cited
Quantum anharmonic oscillators: a new approach
F. J. Gomez, J. Sesma
The determination of the eigenenergies of a quantum anharmonic oscillator consists merely in finding the zeros of a function of the energy, namely the Wronskian of two solutions of…
quant-ph2005
Theorem of Levinson Via The Spectral Density
L. J. Boya, J. Casahorran
We deduce Levinson\'{}s theorem in non-relativistic quantum mechanics in one dimension as a sum rule for the spectral density constructed from asymptotic data. We assume a self-adj…