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Open Quantum Systems Decoherence

Experimental macroscopic coherence by phase-covariant cloning of a single photon

arXiv

Authors: Eleonora Nagali, Tiziano De Angelis, Fabio Sciarrino, Francesco De Martini

Year

2007

Paper ID

49541

Status

Preprint

Abstract Read

~2 min

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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.

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We investigate the multiphoton states generated by high-gain optical parametric amplification of a single injected photon, polarization encoded as a "qubit".

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0707.4068 [2] arXiv https://arxiv.org/abs/0707.4068 [3] Publisher https://arxiv.org/abs/0707.4068

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