Single-experiment-detectable nonclassical correlation witness

TL;DR

This paper introduces a practical method using nonclassical correlation witness maps to detect quantum correlations in bipartite systems with a single experiment, enhancing quantum information processing capabilities.

Contribution

It presents a novel operational approach with a decomposable map enabling single-run detection of nonclassical correlations in bipartite quantum states.

Findings

The method allows detection with a single experimental run.

It generalizes entanglement witnesses to nonclassical correlations.

Feasible implementation in bulk-ensemble systems.

Abstract

Recent progress in theories of quantum information has determined nonclassical correlation defined differently from widely-used entanglement as an important property to evaluate computation and communication with mixed quantum states. We introduce an operational method to detect nonclassical correlation of bipartite systems. In this method, we use particular maps analogous to the well-established entanglement witnesses. Thus, the maps are called nonclassical correlation witness maps. Furthermore, it is proved that such a map can be generally decomposed so that a single-run experiment is feasible for implementation in bulk-ensemble systems.