Extended electrodynamics and toroidal structures.
Casimir effect; CPT-even electrodynamics; Toroidal manifold.
It was determined the energy-momentum tensor for the electromagnetism with Lorentz breaking even term of the Standard Model Extended (SME) photon sector confined in a hyper torus. A generalized partition function method is used, following in parallel the thermofield dynamics formalism written in N-dimensional toroidal manifold. After considering general aspects of the SME photon sector in a toroydal manifold, the influence of the isotropic CPT-even electromagnetic sector of the SME is analysed. The approach is then applied to the Casimir effect at finite temperature, corresponding to a topology (S 1 ) r ×R N−r , where N is the dimension of the Minkowski space-time, and r is the number of compactified dimensions influence of the isotropic CPT-even electromagnetic sector of the SME is analysed.