Towards possibility of self-maintained vacuum traversible wormhole

TL;DR

This paper investigates the electromagnetic vacuum's role in supporting traversable wormholes by calculating stress-energy tensor expectations, revealing conditions under which energy violations occur necessary for wormhole stability.

Contribution

It demonstrates that electromagnetic vacuum can violate energy conditions in static wormholes, a key step toward understanding self-maintained traversable wormholes.

Findings

Vacuum expectation values calculated for electromagnetic stress-energy tensor.

Violation of averaged weak energy condition identified in slow-varying metrics.

Electromagnetic vacuum potentially supports wormhole geometry.

Abstract

We calculate renormalised vacuum expectation values of electromagnetic stress-energy tensor in the static spherically-symmetrical wormhole topology. We find that for metric tensor sufficiently slow varied with distance violation of the averaged weak energy condition takes place irrespectively of the detailed form of metric. This is a necessary condition for the electromagnetic vacuum to be able to support the wormhole geometry.