Transition Probability (Fidelity) and Its Relatives

Abstract

Transition Probability (fidelity) for pairs of density operators can be defined as "functor" in the hierarchy of "all" quantum systems and also within any quantum system. The introduction of "amplitudes" for density operators allows for a more intuitive treatment of these quantities, also pointing to a natural parallel transport. The latter is governed by a remarkable gauge theory with strong relations to the Riemann-Bures metric.

Talk at the 2009 Vaexoe Quantum Theory Conference. 11 pages

References in corpus (2)

• Alternative fidelity measure for quantum states
• Operational approach to the Uhlmann holonomy

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