Physics – Mathematical Physics
Scientific paper
2003-07-28
Rep.Math.Phys. 52, 2003, 331-351
Physics
Mathematical Physics
17 pages
Scientific paper
10.1016/S0034-4877(03)80033-2
On the manifold of positive definite matrices, we investigate the existence of pairs of flat affine connections, dual with respect to a given monotone metric. The connections are defined either using the $\alpha$-embeddings and finding the duals with respect to the metric, or by means of contrast functionals. We show that in both cases, the existence of such a pair of connections is possible if and only if the metric is given by the Wigner-Yanase-Dyson skew information.
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