@fluxtheorist If you want insight, you might consider leavening with quantum measurement theory. https://t.co/pcklIMuzfe is a little old but IMO it's an engaging read.
@juanrga @ThomasHarrigan8 A Lüders operation in general converts a pure state into a mixed state. Try https://t.co/pcklIMuzfe or https://t.co/YbyPGGU75b for quantum measurement theory. Some of the literature means what you say it means, but for what I mean
@ClariceDAiello Hi Clarice. That's how QM should be taught IMO. But, it may require advanced math. Frederic Schuller has done it beautifully, see, https://t.co/Q7X1KBNJcO For textbooks, see P Busch's fantastic book, https://t.co/MwT7xs5JfR P.S.: your pr
@henryquantum Sure. For one thing, in foundations we use the formalism of QM where the state space is the base of a pointed positive cone and POVMs form the dual (https://t.co/GHrZ9SG3lm). The majority of this seems to be based on works of Busch et al in t