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  • Phase damping destroys quantum Fisher information of W states 

    Özaydın, Fatih (Elsevier Science Bv, 2014-09-05)
    We study the quantum Fisher information (QFI) of W states in the basic decoherence channels. We show that, as decoherence starts and increases, under i) depolarizing, QFI smoothly decays; ii) amplitude damping, QFI first ...