Resolve the traversability and macroscopic stability constraints of Casimir wormholes

Establish whether Casimir-supported traversable wormhole geometries can satisfy the constraints required for traversability and macroscopic stability.

Background

The introduction discusses Casimir-type vacuum energy as a possible source of the negative energy needed to support traversable wormholes. Although Casimir effects provide an experimentally verified example of negative vacuum energy, the cited theoretical studies identify unresolved constraints on whether such configurations can remain traversable and stable on macroscopic scales.

The issue concerns the physical viability of the wormhole configurations underlying the astrophysical scenario considered in the paper, rather than a calculation performed within the paper itself.

References

Recent theoretical studies have explored ''Casimir wormholes'', where semiclassical gravitational equations are sourced by Casimir-type vacuum energy distributions, suggesting that quantum vacuum effects may contribute to the stabilization of nontrivial spacetime topologies, although severe constraints on traversability and macroscopic stability remain unresolved \citep{garattini19,oliveira23}.

— Disk-Like Matter Outflow from a Kerr-Type Wormhole: Possible Observational Manifestations and Magnetic Effects  (2610.01457 - Piotrovich et al., 1 Oct 2026) in Section 1, subsection “Wormholes and Quantum Field Theory”