Schr\"{o}dinger oscillators in a deformed point-like global monopole spacetime and a Wu-Yang magnetic monopole: position-dependent mass correspondence and isospectrality

TL;DR

This paper explores how a deformation in a global monopole spacetime leads to a position-dependent mass Schrödinger equation, revealing isospectrality with constant mass oscillators and analyzing the effects of a Wu-Yang monopole and hard-wall boundaries.

Contribution

It demonstrates the equivalence of PDM and constant mass Schrödinger oscillators in a deformed monopole spacetime and analyzes their thermodynamic and spectral properties.

Findings

PDM Schrödinger oscillators are isospectral with constant mass oscillators.

Thermodynamic properties are shared due to isospectrality.

Hard-wall effects cause significant energy level shifts.

Abstract

We show that a specific transformation/deformation in a point-like global monopole (PGM) spacetime background would yield an effective position-dependent mass (PDM) Schr\"{o}dinger equation (i.e., a von Roos PDM Schr\"{o}dinger equation). We discuss PDM Schr\"{o}dinger oscillators in a PGM spacetime in the presence of a Wu-Yang magnetic monopole. Within our transformed/deformed global monopole spacetime, we show that all PDM Schr\"{o}dinger oscillators admit isospectrality and invariance with the constant mass Schr\"{o}dinger oscillators in the regular global monopole spacetime in the presence of a Wu-Yang magnetic monopole. The exclusive dependence of the thermodynamical partition function on the energy eigenvalues manifestly suggests that the Schr\"{o}dinger oscillators and the PDM Schr\"{o}dinger oscillators share the same thermodynamical properties as mandated by their isospectrality. Moreover, we discuss the hard-wall effect on the energy levels of the PDM Schr\"{o}dinger oscillators in a PGM spacetime without and with a Wu-Yang magnetic monopole. Drastic energy levels' shift-ups are observed as a consequence of such hard-wall effect.