Abstract
We investigate the properties of quantum Fisher information in a general superposition of a 3-qubit GHZ state and two W states. Numerical calculation for quantum Fisher information of the 3-qubit state is given. It is shown that the mean spin direction, the length of mean spin and quantum Fisher information are determined by the coefficients of superposition and the relative phase between the GHZ state and the W states.
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Yi, Xj., Huang, Gq. & Wang, JM. Quantum Fisher Information of a 3-Qubit State. Int J Theor Phys 51, 3458–3463 (2012). https://doi.org/10.1007/s10773-012-1230-7
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DOI: https://doi.org/10.1007/s10773-012-1230-7