Hiding Charge in a Wormhole
Eduardo Guendelman, Alexander Kaganovich, Emil Nissimov, Svetlana, Pacheva

TL;DR
This paper demonstrates a charge-hiding effect in wormholes where a charged object appears neutral to an outside observer due to flux expulsion into a compactified universe, involving nonlinear gauge fields and lightlike branes.
Contribution
It introduces a novel charge-hiding phenomenon in wormholes using a gravity/gauge-field system with nonlinear Maxwell terms and lightlike branes, expanding understanding of charge behavior in such geometries.
Findings
Charged objects can appear neutral outside the wormhole.
Flux is expelled into a compactified universe, hiding the charge.
The effect relies on nonlinear gauge fields with QCD-like dynamics.
Abstract
Existence of wormholes can lead to a host of new effects like Misner-Wheeler "charge without charge" effect, where without being generated by any source an electric flux arrives from one "universe" and flows into the other "universe". Here we show the existence of an intriguing opposite possibility. Namely, a charged object (a charged lightlike brane in our case) sitting at the wormhole "throat" expels all the flux it produces into just one of the "universes", which turns out to be of compactified ("tube-like") nature. An outside observer in the non-compact "universe" detects, therefore, a neutral object. This charge-hiding effect takes place in a gravity/gauge-field system self-consistently interacting with a charged lightlike brane as a matter source, where the gauge field subsystem is of a special non-linear form containing a square-root of the Maxwell term and which previously has…
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