Quantum Bayesianism at the Perimeter

Details Quantum Bayesianism at the Perimeter Quantum Bayesianism at the Perimeter

2010-03-26

arxiv.org/abs/1003.5182v1

Physics

Quantum Physics

6 pages, 2 figures; an abridged version of this will appear in Physics in Canada.

Scientific paper

The author summarizes the Quantum Bayesian viewpoint of quantum mechanics, developed originally by C. M. Caves, R. Schack, and himself. It is a view crucially dependent upon the tools of quantum information theory. Work at the Perimeter Institute for Theoretical Physics continues the development and is focused on the hard technical problem of a finding a good representation of quantum mechanics purely in terms of probabilities, without amplitudes or Hilbert-space operators. The best candidate representation involves a mysterious entity called a symmetric informationally complete quantum measurement. Contemplation of it gives a way of thinking of the Born Rule as an addition to the rules of probability theory, applicable when one gambles on the consequences of interactions with physical systems. The article ends by outlining some directions for future work.

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