Passage of radiation through wormholes

TL;DR

This study numerically examines how radiation pulses pass through a wormhole, affecting its stability and evolution, including scenarios of collapse into a black hole or expansion.

Contribution

It provides the first detailed numerical analysis of radiation transmission through wormholes and their dynamic responses to such signals.

Findings

Radiation pulses successfully pass through the wormhole.

The wormhole can either collapse into a black hole or expand after radiation passage.

The dynamics depend on the initial conditions and properties of the scalar fields.

Abstract

We investigate numerically the process of the passage of a radiation pulse through a wormhole and the subsequent evolution of the wormhole that is caused by the gravitational action of this pulse. The initial static wormhole is modeled by the spherically symmetrical Armendariz-Picon solution with zero mass. The radiation pulses are modeled by spherically symmetrical shells of self-gravitating massless scalar fields. We demonstrate that the compact signal propagates through the wormhole and investigate the dynamics of the fields in this process for both cases: collapse of the wormhole into the black hole and for the expanding wormhole.