Foundations of Physics

, Volume 20, Issue 10, pp 1147–1172 | Cite as

Towards a separable “empirical reality”?

  • Bernard d'Espagnat
Part I. Invited Papers Dedicated To John Stewart Bell


“To be” or “to be found”? Some contributions relative to this modern variant of Hamlet's question are presented here. They aim at better apprehending the differences between the points of view of the physicists who consider that present-day quantum measurement theories do reach their objective and those who deny they do. It is pointed out that these two groups have different interpretations of the verbs “to be” and “to have” and of the criterion for truth. These differences are made explicit. A notion of “empirical reality” is constructed within the representation of which the physicists of the first named group can consistently uphold their claim. A detailed way of sharpening this definition so as to make empirical reality free of nonlocal actions at a distance is also described.


Measurement Theory Quantum Measurement Modern Variant Empirical Reality Quantum Measurement Theory 
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Copyright information

© Plenum Publishing Corporation 1990

Authors and Affiliations

  • Bernard d'Espagnat
    • 1
  1. 1.Laboratoire de Physique Théorique et Particules ÉlémentairesUniversité de Paris XIOrsay CedexFrance

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