Coherent superpositions of photon creation operations and their application to multimode states of light

Year: 2021

Authors: Biagi N.; Francesconi S.; Zavatta A.; Bellini M.

Autors Affiliation: Istituto Nazionale di Ottica (CNR-INO), L.go E. Fermi 6, Firenze, 50125, Italy; LENS and Department of Physics & Astronomy, University of Firenze, Sesto Fiorentino, 50019, Italy

Abstract: We present a concise review of recent experimental results concerning the conditional implementation of coherent superpositions of single-photon additions onto distinct field modes. Such a basic operation is seen to give rise to a wealth of interesting and useful effects, from the generation of a tunable degree of entanglement to the birth of peculiar correlations in the photon numbers and the quadratures of multimode, multiphoton, states of light. The experimental investigation of these properties will have an impact both on fundamental studies concerning, for example, the quantumness and entanglement of macroscopic states, and for possible applications in the realm of quantum-enhanced technologies.

Journal/Review: ENTROPY

Volume: 23 (8)      Pages from: 999-1  to: 999-19

More Information: This research was partially funded by the EU under the FET Flagship on Quantum Technologies project “Qombs” (Grant No. 820419) and the ERA-NET QuantERA project “ShoQC” (Grant No. 731473).
KeyWords: quantum optics; single-photon addition; entanglement
DOI: 10.3390/e23080999