Quantum probabilities as Bayesian probabilities

  title={Quantum probabilities as Bayesian probabilities},
  author={Carlton M. Caves and Christopher A. Fuchs and R. Schack},
  journal={Physical Review A},
In the Bayesian approach to probability theory, probability quantifies a degree of belief for a single trial, without any a priori connection to limiting frequencies. In this paper, we show that, despite being prescribed by a fundamental law, probabilities for individual quantum systems can be understood within the Bayesian approach. We argue that the distinction between classical and quantum probabilities lies not in their definition, but in the nature of the information they encode. In the… 
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