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.
Einstein-Podolsky-Rosen correlations in entangled macroscopic quantum systems / DE MARTINI, Francesco; Nagali, Eleonora; Sciarrino, Fabio; Vitelli, Chiara. - 6710:(2007), pp. 67100Y-67100Y-10. (Intervento presentato al convegno Quantum Communications and Quantum Imaging V tenutosi a San Diego; United States nel 26 August 2007 through 28 August 2007) [10.1117/12.740720].
Einstein-Podolsky-Rosen correlations in entangled macroscopic quantum systems
DE MARTINI, Francesco;NAGALI, ELEONORA;SCIARRINO, Fabio;VITELLI, Chiara
2007
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
