Dynamics of massive and massless particles in the spacetime of a wiggly cosmic dislocation

TL;DR

This paper explores how combined small-scale wiggles and dislocation in cosmic strings affect the motion of particles, revealing complex dynamics and modifications to wave and particle behavior in such spacetimes.

Contribution

It introduces a detailed analysis of particle dynamics in a spacetime with both wiggles and dislocation, highlighting their coupled effects on motion and wave propagation.

Findings

Wiggles induce bound states in particle motion.

Dislocation affects angular momentum and eigenvalues.

Coupling leads to complex modifications in radial solutions.

Abstract

In this paper, we investigate the spacetime containing both small-scale structures (wiggles) and spatial dislocation, forming a wiggly cosmic dislocation. We study the combined effects of these features on the dynamics of massive and massless particles. Our results show that while wiggles alone lead to bound states and dislocation introduces angular momentum corrections, their coupling produces more complex effects, influencing both particle motion and wave propagation. Notably, this coupling significantly modifies radial solutions and eigenvalues, with the direction of motion or propagation becoming a critical factor in determining the outcomes. Numerical solutions reveal detailed aspects of particle dynamics as functions of dislocation and string parameters, including plots of trajectories, radial probability densities, and energy levels. These findings deepen our understanding of how a wiggly cosmic dislocation shapes particle dynamics, suggesting new directions for theoretical exploration in cosmological models.