2007/07/27 by Eleonora Nagali, Tiziano De Angelis, Fabio Sciarrino +2 · 2 citations
Chemistry · Computer Science · Mathematics · Physics and Astronomy · #Chemistry #Cloning (programming) #Coherence (philosophical gambling strategy) #Computer science #Covariant transformation #Mathematics #Mesoscopic physics #Optics #Parametric statistics #Photon #Physics #Polarization (electrochemistry) #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Quantum optics and atomic interactions #Qubit #Realization (probability) #quant-ph
paper · pdf · doi:10.1103/physreva.76.042126
published as Phys. Rev. A 76, 042126 (2007) · 5 pages, 5 figures
arxiv created 2007/07/27 · openalex publication_date 2007/10/29 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the multiphoton states generated by high-gain optical parametric amplification of a single injected photon, polarization encoded as a ``qubit.'' The experiment configuration exploits the optimal phase-covariant cloning in the high gain regime. The interference fringe pattern showing the nonlocal transfer of coherence between the injected qubit and the mesoscopic amplified output field involving up to 4000 photons has been investigated. A probabilistic method to extract full information about the multiparticle output wave function has been implemented.