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Foundations of Physics

, Volume 30, Issue 9, pp 1337–1385 | Cite as

Local Measurements of Nonlocal Observables and the Relativistic Reduction Process

  • GianCarlo Ghirardi
Article

Abstract

In this paper we reconsider the constraints which are imposed by relativistic requirements to any model of dynamical reduction. We review the debate on the subject and we call attention on the fundamental contributions by Aharonov and Albert. Having done this we present a new formulation, which is much simpler and more apt for our analysis, of the proposal put forward by these authors to perform measurements of nonlocal observables by means of local interactions and detections. We take into account recently proposed relativistic models of dynamical reduction and we show that, in spite of some mathematical difficulties related to the appearence of divergences, they represent a perfectly appropriate conceptual framework which meets all necessary requirements for a relativistic account of wave packet reduction. Subtle questions like the appropriate way to deal with counterfactual reasoning in a relativistic and nonlocal context are also analyzed in detail.

Keywords

Conceptual Framework Wave Packet Local Measurement Relativistic Model Relativistic Reduction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Publishing Corporation 2000

Authors and Affiliations

  • GianCarlo Ghirardi
    • 1
    • 2
  1. 1.Department of Theoretical PhysicsUniversity of TriesteItaly
  2. 2.Abdus Salam International Centre for Theoretical PhysicsTriesteItaly;

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