Foundations of Physics

, Volume 25, Issue 5, pp 701–716 | Cite as

Propensity, probability, and quantum physics

  • J. Barretto Bastos Filho
  • F. Selleri


Popper's idea of propensities constituting the physical background of predictable probabilities is reviewed and developed by introducing a suitable formalism compatible with standard probability calculus and with its frequency interpretation. Quantum statistical ensembles described as pure cases (“eigenstates”) are shown to be necessarily not homogeneous if propensities are actually at work in nature. An extension of the theory to EPR experiments with local propensities leads to a new and more general proof of Bell's theorem. No joint probabilities for incompatible observables need to be introduced.


Joint Probability Statistical Ensemble Suitable Formalism Standard Probability General Proof 
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Copyright information

© Plenum Publishing Corporation 1995

Authors and Affiliations

  • J. Barretto Bastos Filho
    • 1
  • F. Selleri
    • 2
  1. 1.Departamento de Fisica da Universidade, Federal de AlagoasCidade UniversitariaMaceio-AlagoasBrazil
  2. 2.Dipartimento di FisicaUniversità di Bari, INFNBariItaly

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