Abstract
In a finite quantum state space with a monotone metric, a family of torsion-free affine connections is introduced, in analogy with the classical α-connections defined by Amari. The dual connections with respect to the metric are found and it is shown that they are, in general, not torsion-free. The torsion and the Riemannian curvature are computed and the existence of efficient estimators is treated. Finally, geodesics are used to define a divergence function.
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