Semiclassical back reaction around a cosmic dislocation

TL;DR

This paper investigates the quantum back reaction effects around a cosmic dislocation, revealing a novel helical dragging effect on test particles caused by semiclassical corrections.

Contribution

It derives the first-order semiclassical Einstein equations for a cosmic dislocation and uncovers a unique quantum-induced helical dragging phenomenon.

Findings

First-order semiclassical solution obtained.

Discovery of a helical-like dragging effect.

Quantum back reaction influences particle motion around cosmic dislocation.

Abstract

The energy-momentum vacuum average of a conformally coupled massless scalar field vibrating around a cosmic dislocation (a cosmic string with a dislocation along its axis) is taken as source of the linearized semiclassical Einstein equations. The solution up to first order in the Planck constant is derived. Motion of a test particle is then discussed, showing that under certain circumstances a helical-like dragging effect, with no classical analogue around the cosmic dislocation, is induced by back reaction.