Comment on `Energy spectrum of a Dirac particle with position-dependent mass under the influence of the Aharonov-Casher effect'

TL;DR

This paper critiques a previous study on the energy spectrum of a Dirac particle with position-dependent mass under the Aharonov-Casher effect, highlighting fundamental errors in the original analysis.

Contribution

It provides a critical assessment pointing out the incorrect assumptions and methods used in the prior work, clarifying the proper approach.

Findings

Identifies errors in the original paper's methodology.

Clarifies the correct theoretical framework for the problem.

Highlights the importance of accurate assumptions in quantum physics analyses.

Abstract

It is shown that the paper `Energy spectrum of a Dirac particle with position-dependent mass under the influence of the Aharonov-Casher effect', by Oliveira, Borges and Sousa [Braz. J. Phys. 49, 801 (2019)], is based on a series of ingredients clearly incorrect.