Entangling Macroscopic Light States by Delocalized Photon Addition

Year: 2020

Authors: Biagi N., Costanzo L. S., Bellini M., Zavatta A.

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

Abstract: We present a scheme, based on the delocalized heralded addition of a single photon, to entangle two or more distinct field modes, each containing arbitrary light states. A high degree of entanglement can in principle endure light states of macroscopic intensities and is expected to be particularly robust against losses. We experimentally establish and measure significant entanglement between two identical weak laser pulses containing up to 60 photons each.


Volume: 124 (3)      Pages from: 033604-1  to: 033604-5

More Information: The authors gratefully acknowledge the support of Ente Cassa di Risparmio di Firenze under the project “MOSTO” and of the Italian Ministry of Education, University and Research (MIUR), under the “Progetto Premiale: QSecGroundSpace,” and of the EU under the ERA-NET QuantERA project “ShoQC”.
KeyWords: Entanglement detection, Entanglement production, Quantum optics, Quantum state engineering, Quantum states of light
DOI: 10.1103/PhysRevLett.124.033604