Laser Physics

, Volume 16, Issue 11, pp 1551–1556

Experimental high-gain quantum-injected optical parametric amplification and multiphoton phase-covariant cloning

  • M. Caminati
  • F. De Martini
  • F. Sciarrino
Quantum Information and Quantum Computation

DOI: 10.1134/S1054660X06110089

Cite this article as:
Caminati, M., De Martini, F. & Sciarrino, F. Laser Phys. (2006) 16: 1551. doi:10.1134/S1054660X06110089

Abstract

We investigate multiphoton states generated by high-gain optical parametric amplification of a single injected photon—polarization encoded as a qubit. The experimental configuration exploits the optimal phase-covariant cloning. The output state of the apparatus is found to exhibit the quantum superposition property of mesoscopic multiphoton assemblies involving about 300 photons. This work represents an experimental advance toward the test of several fundamental quantum processes in mesoscopic or macroscopic frameworks.

PACS numbers

03.67.-a 03.67.Hk 42.65.Lm 

Copyright information

© MAIK “Nauka/Interperiodica” 2006

Authors and Affiliations

  • M. Caminati
    • 1
  • F. De Martini
    • 1
  • F. Sciarrino
    • 1
    • 2
  1. 1.Dipartimento di Fisica and Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia Università “La Sapienza”RomaItaly
  2. 2.Centro di Studi e Ricerche “Enrico Fermi”RomaItaly