Experimental progress on quantum coherence: detection, quantification, and manipulation

TL;DR

This paper reviews recent experimental advances in detecting, quantifying, and manipulating quantum coherence across various physical platforms, highlighting progress in understanding coherence as a quantum resource.

Contribution

It provides a comprehensive overview of experimental techniques and results related to quantum coherence, emphasizing recent developments and applications.

Findings

Experimental detection and quantification methods established

Progress in coherence distillation and state conversion

Insights into coherence dynamics and multipartite coherence

Abstract

Quantum coherence is a fundamental property of quantum systems, separating quantum from classical physics. Recently, there has been significant interest in the characterization of quantum coherence as a resource, investigating how coherence can be extracted and used for quantum technological applications. In this work we review the progress of this research, focusing in particular on recent experimental efforts. After a brief review of the underlying theory we discuss the main platforms for realizing the experiments: linear optics, nuclear magnetic resonance, and superconducting systems. We then consider experimental detection and quantification of coherence, experimental state conversion and coherence distillation, and experiments investigating the dynamics of quantum coherence. We also review experiments exploring the connections between coherence and uncertainty relations, path information, and coherence of operations and measurements. Experimental efforts on multipartite and multilevel coherence are also discussed.