Practical schemes for the measurement of angular-momentum covariance matrices in quantum optics

TL;DR

This paper presents practical measurement schemes for angular-momentum covariance matrices in quantum optics, applicable to polarimetry, interferometry, and atomic ensembles, highlighting advantages of noisy simultaneous measurements.

Contribution

It introduces new practical schemes for measuring angular-momentum covariance matrices across various quantum optics systems, emphasizing noisy measurement benefits.

Findings

Effective measurement schemes for angular-momentum covariance matrices.

Advantages of noisy simultaneous measurements demonstrated.

Applicable to polarimetry, interferometry, and atomic ensembles.

Abstract

We develop practical schemes for the measurement of the covariance matrix for intrinsic angular-momentum variables in quantum optics. We particularize this approach to two-beam polarimetry and interferometry, as well as to ensembles of two-level atoms interacting with classical fields. We show the practical advantages of noisy simultaneous measurements.