Spatial state Stokes-operator squeezing and entanglement for optical beams

TL;DR

This paper explores the quantum properties of optical beam's spatial variables using Stokes operators, proposing a detection scheme for measuring and generating squeezing and entanglement in these variables.

Contribution

It introduces a novel representation for spatial quantum properties and a scheme to generate and measure spatial Stokes operator squeezing and entanglement.

Findings

Proposed a spatial detection scheme for all three spatial variables.

Demonstrated the potential for generating spatial Stokes operator squeezing.

Outlined methods for creating entanglement in spatial degrees of freedom.

Abstract

The transverse spatial attributes of an optical beam can be decomposed into the position, momentum and orbital angular momentum observables. The position and momentum of a beam is directly related to the quadrature amplitudes, whilst the orbital angular momentum is related to the polarization and spin variables. In this paper, we study the quantum properties of these spatial variables, using a representation in the Stokes-operator basis. We propose a spatial detection scheme to measure all three spatial variables and consequently, propose a scheme for the generation of spatial Stokes operator squeezing and entanglement.