Dyonic Ellis-Bronnikov wormholes from warped extra dimensions

TL;DR

This paper constructs and classifies traversable wormhole solutions in four-dimensional theories derived from five-dimensional Einstein-Maxwell-Chern-Simons models, revealing their higher-dimensional origins and rich structure.

Contribution

It provides a systematic classification of dyonic Ellis-Bronnikov wormholes from warped extra dimensions, including new solutions with coupled scalar, axion, and gauge fields.

Findings

Regular, asymptotically flat traversable wormholes are derived from higher-dimensional theories.

The solution space includes pure phantom-supported and fully coupled dilaton-axion-gauge configurations.

Kaluza-Klein sector adds structure while maintaining analytic solvability.

Abstract

We investigate traversable wormhole solutions within a four-dimensional effective theory derived from a five-dimensional Einstein-Maxwell-Chern-Simons action with a non-minimally coupled scalar field. A warped Kaluza-Klein compactification yields an Einstein-frame theory containing a phantom dilaton, a canonical axion, a Maxwell field, and a Kaluza-Klein vector, with the couplings fixed by the higher-dimensional origin. Focusing on the Ellis-Bronnikov geometry, we construct solutions that incorporate both dyonic Maxwell and Kaluza-Klein fields. For exponential gauge couplings, the Einstein equations determine the scalar kinetic term and the combined potentials, while the remaining field equations reduce to algebraic relations fixing the individual potentials and the radial behaviour of the electric charges. We obtain a systematic classification of configurations, ranging from the pure phantom-supported wormhole to fully coupled dilaton-axion-gauge configurations. The Kaluza-Klein sector enriches the solution space with additional structure while preserving analytic tractability. These results show that regular, asymptotically flat traversable four-dimensional wormholes arise naturally from higher-dimensional scalar-tensor theories.