Latent optical nonclassicality of conditionally prepared states

TL;DR

This paper introduces a method to detect hidden optical nonclassicality in quantum states, overcoming measurement limitations by testing for steering of latent nonclassical correlations in conditionally prepared states.

Contribution

The authors develop a novel technique to reveal latent nonclassicality in quantum states using steering tests, expanding the tools for quantum resource detection.

Findings

Successfully detects nonclassicality beyond entanglement

Provides a rigorous framework for steering of latent nonclassicality

Overcomes informational incompleteness in quantum measurements

Abstract

The lack of information obtained from informationally incomplete quantum measurements can prevent the detection of quantum resources, such as optical nonclassicality. We develop a technique that overcomes this limitation for single-mode quantum states conditionally prepared through measurements on another mode of a two-mode state. This task is performed by testing steering of latent nonclassicality -- a class of correlations beyond quantum entanglement and quantum discord -- for which we introduce a rigorous description.