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In this paper we investigate the bosonic Casimir effect in aLorentz-violating symmetry scenario. The theoretical model adopted consists ofa real massive scalar quantum field confined in a region between two largeparallel plates, having its dynamics governed by a modified Klein-Gordonequation that presents a Lorentz symmetry breaking term. In this context weadmit that the quantum field obeys specific boundary conditions on the plates.The Lorentz-violating symmetry is implemented by the presence of an arbitraryconstant space-like vector in a CPT-even aether-like approach, considering adirect coupling between this vector with the derivative of the field in higherorder. The modification on the Klein-Gordon equation produces importantcorrections on the Casimir energy and pressure. Thus, we show that thesecorrections strongly depend on the order of the higher derivative term and thespecific direction of the constant vector, as well as the boundary conditionsconsidered.

Bosonic Casimir effect in an aether-like Lorentz-violating scenario with higher order derivatives