1,414 research outputs found
Consistent histories and relativistic invariance in the modal interpretation of quantum mechanics
Modal interpretations of quantum mechanics assign definite properties to
physical systems and specify single-time joint probabilities of these
properties. We show that a natural extension, applying to properties at several
times, can be given if a decoherence condition is satisfied. This extension
defines "consistent histories" of modal properties. We suggest a new form of
the modal scheme, that offers prospects of a more general applicability of the
histories concept. Finally, we discuss a possible way of applying these ideas
to relativistic quantum field theory.Comment: 13 pages, no figure
Scopes and Limits of Modality in Quantum Mechanics
We develop an algebraic frame for the simultaneous treatment of actual and
possible properties of quantum systems. We show that, in spite of the fact that
the language is enriched with the addition of a modal operator to the
orthomodular structure, contextuality remains a central feature of quantum
systems.Comment: 9 pages, no figure
Semilattices global valuations in the topos approach to quantum mechanics
In the framework of the topos approach to quantum mechanics a kind of global valuation is introduced and studied. It allows us to represent certain features related to the logical consequences of properties about quantum systems when its phase space is endowed with an intuitionistic structureFil: Freytes Solari, Hector Carlos. UniversitĂ di Cagliari; Italia. Universidad Nacional de Rosario; Argentina. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: de Ronde, Christian. Universidad de Buenos Aires. Facultad de FilosofĂa y Letras. Instituto de FilosofĂa "Dr. Alejandro Korn"; Argentina. Center Leo Apostel; BĂ©lgica. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; ArgentinaFil: Domenech, Graciela. Center Leo Apostel; BĂ©lgica. Consejo Nacional de Investigaciones CientĂficas y TĂ©cnicas; Argentin
A Topological Study of Contextuality and Modality in Quantum Mechanics
Kochen-Specker theorem rules out the non-contextual assignment of values to
physical magnitudes. Here we enrich the usual orthomodular structure of quantum
mechanical propositions with modal operators. This enlargement allows to refer
consistently to actual and possible properties of the system. By means of a
topological argument, more precisely in terms of the existence of sections of
sheaves, we give an extended version of Kochen-Specker theorem over this new
structure. This allows us to prove that contextuality remains a central feature
even in the enriched propositional system.Comment: 10 pages, no figures, submitted to I. J. Th. Phy
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