A Gill and Massar type precision bound is proved and shown attainable for estimating multiparameter SU(2) unitary channels with arbitrary weight matrices.
State estimation for large ensembles,
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Gill and Massar type bound for estimation of $SU(2)$ channel
A Gill and Massar type precision bound is proved and shown attainable for estimating multiparameter SU(2) unitary channels with arbitrary weight matrices.