In Plebański nonlinear electrodynamics, Casimir energy diverges approaching Lorentz-breaking magnetic vacua in the regular sector, but this signals noncommutativity of quantization and symmetry-breaking imposition rather than physical divergence at the exact vacuum.
Casimir energy and topological mass for a massive scalar field with Lorentz violation,
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Calculates renormalized Casimir free energy and thermodynamic quantities for a scalar field in a wormhole spacetime at finite temperature, finding geometry-independent thermal corrections in the comoving frame.
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Casimir effect near spontaneously Lorentz-breaking magnetic vacua in Pleba\'nski nonlinear electrodynamics
In Plebański nonlinear electrodynamics, Casimir energy diverges approaching Lorentz-breaking magnetic vacua in the regular sector, but this signals noncommutativity of quantization and symmetry-breaking imposition rather than physical divergence at the exact vacuum.
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Thermal Casimir Effect in A Schwarzschild-like Wormhole Spacetime
Calculates renormalized Casimir free energy and thermodynamic quantities for a scalar field in a wormhole spacetime at finite temperature, finding geometry-independent thermal corrections in the comoving frame.