Quantum Light for Multiphoton Metrology, Imaging and Spectroscopy

The generation and precise control of non-classical states of light constitute the fundamental building block upon which new and fascinating technologies are arising. The development of novel quantum devices has recently become the engine of technological innovations in different fields of science and engineering. Consequently, recent years have witnessed an explosion of several experimental and theoretical investigations highlighting the potential of quantum light for offering unprecedented levels of sensitivity and resolution in metrology, imaging and spectroscopy. In this Research Topic, our goal is to feature state-of-the-art research in quantum metrology, imaging and spectroscopy, including efforts being made in the generation and manipulation of multi-photon quantum states of light, such as on-demand single-photon sources, bright entangled-photon states, high-flux squeezed light, and their real-world potential applications.

The study of new schemes or techniques for the generation of quantum states of light - and their application to metrology, imaging and spectroscopy - is a timely and exciting research field at the forefront of physics and technology. Given the increasing number of both scientists and engineers devoting efforts to design and implement novel quantum technologies, we believe that Frontiers in Physics is the ideal outlet through which all these people can connect and exchange new ideas. Through this Research Topic, we intend to advance our understanding of the generation and manipulation of bright, multiphoton quantum light, as well as its use in the development of novel applications and technologies of potentially high impact.

We welcome submissions of research articles, review articles as well as brief research reports. Topics covered include, but are not limited to:
- Quantum light for imaging applications (including advances in microwave and terahertz sources, ghost imaging, microscopy, nonlinear interferometry, super-resolved imaging, and optical coherence tomography)
- Entangled two-photon absorption and quantum-enhanced nonlinear spectroscopy
- Quantum enabling technologies (light sources, detectors)
- Quantum nanophotonics and plasmonics for sensing and spectroscopy
- Theory of quantum light-matter interactions

Keywords: Non-classical light, Quantum Applications, Quantum Technologies, Quantum Metrology, Quantum Imaging, Quantum-Enhanced Spectroscopy

Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.