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Proceedings Paper

Einstein-Podolsky-Rosen correlations in entangled macroscopic quantum systems
Author(s): F. De Martini; E. Nagali; F. Sciarrino; C. Vitelli
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Paper Abstract

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 non local transfer of coherence between the injected qubit and the mesoscopic amplified output field involving up to 4000 photons has been investigated. A probabilistic new method to extract full information about the multiparticle output wavefunction has been implemented. This technique can be adopted to test the entanglement between a microscopic system and a macro one.

Paper Details

Date Published: 25 September 2007
PDF: 10 pages
Proc. SPIE 6710, Quantum Communications and Quantum Imaging V, 67100Y (25 September 2007); doi: 10.1117/12.740720
Show Author Affiliations
F. De Martini, Univ. di Roma La Sapienza (Italy)
E. Nagali, Univ. di Roma La Sapienza (Italy)
F. Sciarrino, Ctr. di Studi e Ricerche Enrico Fermi (Italy)
Univ. di Roma La Sapienza (Italy)
C. Vitelli, Univ. di Roma La Sapienza (Italy)

Published in SPIE Proceedings Vol. 6710:
Quantum Communications and Quantum Imaging V
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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