Magnetic corrections to the fermionic Casimir effect with Lorentz symmetry violation and a compactified extra dimension

Abstract

In this work I study the effect of a magnetic field on the Casimir effect due to a massive, charged fermion field that violates Lorentz invariance in an aether-like manner while maintaining CPT, in a space with one toroidally compactified extra dimension. I take the fermion field to obey MIT bag boundary conditions on two identical square parallel plates. I do this investigation using the zeta function technique that enables me to calculate the Casimir energy and pressure in the presence of a constant magnetic field perpendicular to the plates. I examine the cases of timelike Lorentz violation, of spacelike Lorentz violation in the direction of the magnetic field, of spacelike Lorentz violation in the direction perpendicular to the magnetic field, and of spacelike Lorentz violation in the direction of the compactified extra dimension. In all scenarios, I find simple and accurate analytic expressions of the magnetic field dependent Casimir energy and pressure.