Quantum fisher information of bipartitions of W states
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CitationÖzaydın, F., Altıntaş, A. A., Yeşilyurt, C., Buğu, S. & Erol, V. (2015). Quantum fisher information of bipartitions of W states. Acta Physica Polonica A, 127(4), 1233-1235. doi:10.12693/APhysPolA.127.1233
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.