Probabilistic Dual Frames and Minimization of Dual Frame Potentials

This paper studies probabilistic dual frames and associated dual frame potentials from the optimal mass transport perspective. The main contribution in this work shows that given a probabilistic frame, its dual frame potential is minimized if and only if the probabilistic frame is tight and the probabilistic dual frame is the canonical dual. In particular, the tightness condition can be dropped if the probabilistic dual frame potential is minimized only among probabilistic dual frames of pushforward type.