International Journal of Theoretical Physics

, Volume 54, Issue 12, pp 4410–4422 | Cite as

A Survey of the ESR Model for an Objective Reinterpretation of Quantum Mechanics



Contextuality and nonlocality (hence nonobjectivity of physical properties) are usually maintained to be unavoidable features of quantum mechanics (QM), following from its mathematical apparatus. Moreover they are considered as basic in quantum information processing. Nevertheless they raise still unsolved problems, as the objectification problem in the quantum theory of measurement. The extended semantic realism (ESR) model offers a way out from these difficulties by reinterpreting quantum probabilities as conditional rather than absolute and embedding the mathematical formalism of QM into a broader mathematical framework. A noncontextual hidden variables theory can then be constructed which justifies the assumptions introduced in the ESR model and proves its objectivity. Both linear and nonlinear time evolution occur in this model, depending on the physical environment, as in QM. In addition, the ESR model implies modified Bell’s inequalities that do not necessarily conflict with QM, supplies different mathematical representations of proper and improper mixtures, provides a general framework in which the local interpretations of the GHZ experiment obtained by other authors are recovered, and supports an interpretation of quantum logic which avoids the introduction of the problematic notion of quantum truth.


Contextuality Nonlocality Objectification problem Nonobjectivity ESR model “no-go” theorems GHZ experiment Quantum logic 


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© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Mathematics and PhysicsUniversity of SalentoLecceItaly

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