Unknown Quantum States and Operations, a Bayesian View

摘要: The classical de Finetti theorem provides an operational definition of the concept unknown probability in Bayesian theory, where probabilities are taken to be degrees belief instead objective states nature. In this paper, we motivate and review two results that generalize Finetti's quantum mechanical setting: Namely a for operations. quantum-state theorem, closely analogous fashion original deals with exchangeable density-operator assignments "unknown state" tomography. Similarly, quantum-operation gives operation" quantum-process These especially important interpretation mechanics, (at least some) operations rather than