Quantum Fisher Information of Bipartitions of W States |
| F. Ozaydina, A.A. Altintasb, C. Yesilyurtc, S. Bugud, V. Erole,f
aDepartment of Information Technologies, Faculty of Science and Letters, Isik University, Istanbul, Turkey bDepartment of Electrical Engineering, Faculty of Engineering and Architecture, Okan University, Istanbul, Turkey cDepartment of Computer Engineering, Faculty of Engineering and Architecture, Okan University, Istanbul, Turkey dDepartment of Computer Engineering, Institute of Science, Istanbul, Turkey eDepartment of Computer Engineering, Institute of Science, Okan University, Istanbul, Turkey fProvus A MasterCard Company R&D Center, Istanbul, Turkey |
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| We study the quantum Fisher information (QFI) of W states and W-like states under decoherence. In particular, we find that on the contrary to amplitude damping and depolarizing decoherence, a W-like state of 3 qubits obtained by discarding 1 qubit of a genuine W state of 4 qubits is more robust than a genuine W state of 3 qubits under amplitude amplifying and phase damping decoherence. |
DOI: 10.12693/APhysPolA.127.1233 PACS numbers: 03.67.-a, 03.65.Ud, 03.65.Yz |