4 papers
Discrete Wigner Functions from Informationally Complete Quantum Measurements
John B. DeBrota, Blake C. Stacey
Wigner functions provide a way to do quantum physics using quasiprobabilities, that is, "probability" distributions that can go negative. Informationally complete POVMs, a much you…
Lüders Channels and the Existence of Symmetric Informationally Complete Measurements
John B. DeBrota, Blake C. Stacey
The Lüders rule provides a way to define a quantum channel given a quantum measurement. Using this construction, we establish an if-and-only-if condition for the existence of a …
The Varieties of Minimal Tomographically Complete Measurements
John B. DeBrota, Christopher A. Fuchs, Blake C. Stacey
Minimal Informationally Complete quantum measurements, or MICs, illuminate the structure of quantum theory and how it departs from the classical. Central to this capacity is their…
FAQBism
John B. DeBrota, Blake C. Stacey
We answer several questions that have been Frequently Asked about QBism. These remarks (many of them lighthearted) should be considered supplements to more systematic treatments by…