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Quantum Fisher Information of W and GHZ State Superposition Under Decoherence

Published 22 Apr 2017 in quant-ph | (1704.07367v1)

Abstract: We study the changes in quantum Fisher information (QFI) values for one quantum system consisting of a superposition of W and GHZ states. In a recent work [6], QFI values of this mentioned system studied. In this work, we extend this problem for the changes of QFI values in some noisy channels. We show the change in QFI depending on noise parameters. We report interesting results for different type of decoherence channels.

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