2021
DOI: 10.48550/arxiv.2112.11590
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Quantum fisher information protection of N-qubit Greenberger-Horne-Zeilinger state from decoherence

Abstract: In this paper we study the protection of N -qubit Greenberger-Horne-Zeilinger (GHZ) state and generalized N -qubit GHZ states in amplitude damping channel by means of quantum weak measurement and flip operations. We derive the explicit formulas of the performances of the protection scheme: average fidelity, average probability and the average quantum fisher information (QFI). Moreover, the analytical results for maximizing the average fidelity and probability are obtained. We show that our scheme can effective… Show more

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“…Weak measurement has found uses in protecting the quantum state from amplitude damping Noise. The protocol given in the paper [25] is used to protect the state from decoherence. The steps involved in the process are…”
Section: Weak Measurement Based Protection Protocolmentioning
confidence: 99%
“…Weak measurement has found uses in protecting the quantum state from amplitude damping Noise. The protocol given in the paper [25] is used to protect the state from decoherence. The steps involved in the process are…”
Section: Weak Measurement Based Protection Protocolmentioning
confidence: 99%