Eur. Phys. J. C (2020) 80: 53
https://doi.org/10.1140/epjc/s10052-019-7603-9

Comment

Comment on “Comment on Linear confinement of a scalar particle in a Gödel-type space-time”

¹ Departamento de Física, Universidade Federal do Maranhão, Campus Universitário do Bacanga, São Luís, MA, 65080-805, Brazil
² Departamento de Física e Química, Universidade Estadual Paulista (UNESP), Campus de Guaratinguetá, Guaratinguetá, SP, 12516-410, Brazil

^* e-mail: luis.castro@ufma.br
^** e-mail: luis.castro@pq.cnpq.br

Received: 27 August 2019
Accepted: 23 October 2019
Published online: 23 January 2020

Abstract

We show that from an appropriate manipulation of the biconfluent Heun differential equation one can obtain the correct expression for the energy eigenvalues for the Klein–Gordon equation without potential in the background of Som–Raychaudhuri space-time with a cosmic string as a particular case () of Vitória et al. (Eur Phys J C 78(1):44, 2018), in opposition what was stated in a recent paper published in this journal (Ahmed in Eur Phys J C 79(8):682, 2019).