4 papers · 1 filter
QBism on Locality and Nonlocality
John B. DeBrota, Christopher A. Fuchs, Rüdiger Schack
Recently Pienaar (2026), building on work of Cavalcanti (2021), has shown that QBism cannot always assume distinct observers' quantum-measurement outcomes---say, of Wigner and his…
QBism, Polishing Some Points
Christopher A. Fuchs, Blake C. Stacey
QBism pursues the real by first eliminating the elements of quantum theory too fragile to be ontologies on their own. Thereafter, it seeks an "ontological lesson" from whatever rem…
Quantum States with Maximal Magic
Gianluca Cuffaro, Christopher A. Fuchs
Finding ways to quantify magic is an important problem in quantum information theory. Recently Leone, Oliviero and Hamma introduced a class of magic measures for qubits, the stabil…
Quantum Dynamics Happens Only on Paper: QBism's Account of Decoherence
John B. DeBrota, Christopher A. Fuchs, Ruediger Schack
QBism has long recognized quantum states, POVM elements, Kraus operators, and even unitary operations to be cut from the same cloth: They express aspects of an agent's belief syste…