An Accurate Zeroth-Order Perturbation Theory for Solving Power-Law Potentials within the Framework of the Asymptotic Iteration Method
Abstract
Spherically symmetric singular potentials have a wide range of applications, such as molecular and atomic physics. In this work, we present a zeroth-order perturbation theory for solving the Schrödinger equation within the framework of the asymptotic iteration method (AIM). We rely on exponential and hyperbolic potential ansatz substitutions, where the difference between the original and new potential is treated as a small perturbation. Each potential ansatz has a free parameter chosen small enough to give an accurate zeroth-order perturbative wave equation solution. This method avoids the oscillatory behavior observed in the asymptotic iteration solutions when applying the AIM to such problems. Finally, we illustrate our approach by solving a few problems, particularly potentials with quartic and sextic singularities. We compare our results with those obtained via other methods and find good agreement.
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BibTeX
@misc{sous2026accurate,
title = {{An Accurate Zeroth-Order Perturbation Theory for Solving Power-Law Potentials within the Framework of the Asymptotic Iteration Method}},
author = {A. J. Sous and Ibsal Assi and Nasser Saad},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.24805},
eprint = {2610.24805},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.24805},
note = {CC0},
}
RIS
TY - UNPB
TI - An Accurate Zeroth-Order Perturbation Theory for Solving Power-Law Potentials within the Framework of the Asymptotic Iteration Method
AU - A. J. Sous
AU - Ibsal Assi
AU - Nasser Saad
PY - 2026
DA - 2026/10/17
PB - arXiv
DO - 10.48550/arxiv.2610.24805
UR - https://arxiv.org/abs/2610.24805
AB - Spherically symmetric singular potentials have a wide range of applications, such as molecular and atomic physics. In this work, we present a zeroth-order perturbation theory for solving the Schrödinger equation within the framework of the asymptotic iteration method (AIM). We rely on exponential and hyperbolic potential ansatz substitutions, where the difference between the original and new potential is treated as a small perturbation. Each potential ansatz has a free parameter chosen small enough to give an accurate zeroth-order perturbative wave equation solution. This method avoids the oscillatory behavior observed in the asymptotic iteration solutions when applying the AIM to such problems. Finally, we illustrate our approach by solving a few problems, particularly potentials with quartic and sextic singularities. We compare our results with those obtained via other methods and find good agreement.
ER -