Field sources for generalized Ellis–Bronnikov wormhole

Abstract The so-called generalized Ellis–Bronnikov (EB) wormhole is a modification of the standard EB solution, in which a parameter m > 2 is introduced-recovering the original EB geometry when m = 2 . In this work, we investigate the properties of this spacetime by analyzing its embedding diagrams and how they are affected by variations in the parameter m . Furthermore, we study the accretion of dust onto this geometry, showing that, unlike in black hole scenarios, the radial infall velocity of the dust decreases as it approaches the wormhole throat, with this deceleration becoming increasingly abrupt for larger values of m . Our results also demonstrate that the mass of the wormhole generally decreases due to the accretion process, a finding that aligns with recent works in the literature for EB-type geometries. This mass loss, coupled with the characteristic accumulation of matter near the throat, highlights the unique dynamical response of traversable wormholes to baryonic influx. As a main result, we demonstrate that this geometry arises as an exact solution of general relativity when considering the combined presence of a phantom scalar field and a magnetic or electric source.