Quantum mechanics without probability amplitudes

  title={Quantum mechanics without probability amplitudes},
  author={William K. Wootters},
  journal={Foundations of Physics},
  • W. Wootters
  • Published 1 April 1986
  • Physics
  • Foundations of Physics
First steps are taken toward a formulation of quantum mechanics which avoids the use of probability amplitudes and is expressed entirely in terms of observable probabilities. Quantum states are represented not by state vectors or density matrices but by “probability tables,” which contain only the probabilities of the outcomes of certain special measurements. The rule for computing transition probabilities, normally given by the squared modulus of the inner product of two state vectors, is re… 
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