Comment on “PDM creation and annihilation operators of the harmonic oscillators and the emergence of an alternative PDM-Hamiltonian” by Omar Mustafa [Phys. Lett. A 384 (2020) 126265]

•No equispaced nature on mass dependent quantum systems.•No equispaced spectra of quartic potential.•No equispaced spectra of cubic and negative quartic PT-symmetric potentials.•No equispaced spectra of non-linear models.•We believe the claim of equispaced nature in spectra is based on an ad-hoc ass...

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Published in:Physics letters. A 2021-03, Vol.393, p.127174, Article 127174
Main Author: Rath, Biswanath
Format: Article
Language:English
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Summary:•No equispaced nature on mass dependent quantum systems.•No equispaced spectra of quartic potential.•No equispaced spectra of cubic and negative quartic PT-symmetric potentials.•No equispaced spectra of non-linear models.•We believe the claim of equispaced nature in spectra is based on an ad-hoc assumption.
ISSN:0375-9601
1873-2429
DOI:10.1016/j.physleta.2021.127174