The effect of Dirac phase on acoustic vortex in media with screw dislocation

TL;DR

This paper investigates how screw dislocations in media influence acoustic vortices, revealing that the topological Dirac phase alters vortex strength and angular momentum, demonstrating robustness against system fluctuations.

Contribution

It introduces the application of Katanaev-Volovich theory to analyze the impact of screw dislocations on acoustic vortices, highlighting the role of topological Dirac phase.

Findings

Screw dislocation affects acoustic vortex properties.

Topological Dirac phase causes changes in vortex strength.

Effects are robust against system fluctuations.

Abstract

We study acoustic vortex in media with screw dislocation using the Katanaev-Volovich theory of defects. It is shown that the screw dislocation affects the beam's orbital angular momentum and changes the acoustic vortex strength. This change is a manifestation of topological Dirac phase and is robust against fluctuations in the system.