  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.
