Eur. Phys. J. C (2012) 72: 2051
https://doi.org/10.1140/epjc/s10052-012-2051-9

Regular Article - Theoretical Physics

Relativistic quantum dynamics of a charged particle in cosmic string spacetime in the presence of magnetic field and scalar potential

Dept. de Física-CCEN, Universidade Federal da Paraíba, C. Postal 5008, 58059-970, J. Pessoa, PB, Brazil

^* e-mail: emello@fisica.ufpb.br

Received: 27 February 2012
Revised: 8 May 2012
Published online: 26 June 2012

Abstract

In this paper we analyze the relativistic quantum motion of charged spin-0 and spin- particles in the presence of a uniform magnetic field and scalar potentials in the cosmic string spacetime. In order to develop this analysis, we assume that the magnetic field is parallel to the string and the scalar potentials present a cylindrical symmetry with their center on the string. Two distinct configurations for the scalar potential, S(r), are considered: (i) the potential proportional to the inverse of the polar distance, i.e., S∝1/r, and (ii) the potential proportional to this distance, i.e., S∝r. The energy spectra are explicitly computed for different physical situations and their dependences on the magnetic field strength and scalar coupling constants are presented.