Entanglement and Non-locality in a Micro-Macroscopic system

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dc.creatorDe Martini, Francesco
dc.creatorSciarrino, Fabio
dc.creatorVitelli, Chiara
dc.date2008-04-02
dc.date.accessioned2026-07-07T09:29:52Z
dc.date.available2026-07-07T09:29:52Z
dc.descriptionIn recent years two fundamental aspects of quantum mechanics have attracted a great deal of interest, namely the investigation on the irreducible nonlocal properties of Nature implied by quantum entanglement and the physical realization of the 'Schroedinger Cat'. In the present work a macro - state consisting of about 3.5 x 10^4 photons in a quantum superposition and entangled with a far apart single - photon state is generated. Then, the non-separability of the overall micro-macro system is demonstrated and the corresponding Bell's inequalities are found to be violated. Precisely, an entangled photon pair is created by a nonlinear optical process, then one photon of the pair is injected into an optical parametric amplifier operating for any input polarization state, i.e. into a phase-covariant cloning machine. Such transformation establishes a connection between the single photon and the multi particle fields. We then demonstrate the non-separability of the bipartite system by adopting a local filtering technique within a positive operator valued measurement.
dc.description12 pages, 11 figures
dc.identifierhttps://arxiv.org/abs/0804.0341
dc.identifierhttp://arxiv.org/abs/0804.0341
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157945
dc.subjectQuantum Physics
dc.titleEntanglement and Non-locality in a Micro-Macroscopic system
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