Realization of an optimally distinguishable multiphoton quantum superposition |
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| Authors: | De Martini Francesco Sciarrino Fabio Secondi Veronica |
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| Affiliation: | Dipartimento di Fisica and Istituto Nazionale di Fisica per la Materia, Universitá La Sapienza, Roma 00185, Italy. |
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| Abstract: | We report the realization of an entangled quantum superposition of M approximately 12 photons by multiple universal cloning of a single-photon qubit via the high gain, quantum-injected optical parametric amplification. The system has been found extremely resilient to decoherence. By quantum tomography, the nonseparability and the quantum superposition are demonstrated for the mesoscopic output state of the dynamic "closed system." |
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