Anomalous resilient to decoherence macroscopic quantum superpositions generated by universally covariant optimal quantum cloning

Details Anomalous resilient to decoherence macroscopic quantum superpositions generated by universally covariant optimal quantum cloning Anomalous resilient to decoherence macroscopic quantum superpositions generated by universally covariant optimal quantum cloning

2010-03-03

arxiv.org/abs/1003.0831v1

Physics

Quantum Physics

8 pages, 6 figures

Scientific paper

We show that the quantum states generated by universal optimal quantum cloning of a single photon represent an universal set of quantum superpositions resilient to decoherence. We adopt Bures distance as a tool to investigate the persistence ofquantum coherence of these quantum states. According to this analysis, the process of universal cloning realizes a class of quantum superpositions that exhibits a covariance property in lossy configuration over the complete set of polarization states in the Bloch sphere.

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