# Generation of orbital angular momentum through twisted Variable retarders

## TL;DR

This paper explores how twisted variable retarders can generate orbital angular momentum in polarized light, analyzing their quantum processing capabilities, geometric phase effects, and applications in antenna array wavefront shaping.

## Contribution

It introduces a new physical approach to understanding the entanglement and OAM generation via twisted variable retarders, with insights into geometric phase and wavefront shaping.

## Key findings

- Geometric phase linked with twist-dependent OAM gain.
- Successive antenna arrays produce flattened wave fronts explained by entanglement.
- VCR and VLR studied for quantum processing of entangled states.

## Abstract

Polarized light passing through twisted special wave plates show entangled state of both SAM and OAM. The variable circular and linear retarders (VCR and VLR) are studied here from the view point of quantum processing of entangled states. Interestingly the geometric phase in association with twist dependent gain of OAM has been discussed here. As an application of VLR, the origin of gradual flattened shape of wave fronts through successive array of antennas (QHQ) has been explained through new physical approach of the concurrence of entangled states.