[Todos] Charlas sobre interpretación de la Mecánica Cuántica

[Sebastian "el fune" Fortin]

El grupo de filosofía de las ciencias (física, química y biología) de la
FCEyN tiene el agrado de invitar a las charlas de dos reconocidos filósofos
de la física brasileros, Decio Krause y Osvaldo Pessoa, acerca de
cuestiones relacionadas con la interpretación de la mecánica cuántica.
El encuentro se realizará el miércoles 29 de Mayo a las 15 hs., en el Aula
5 del Pabellón 2.
Los abstracts se adjuntan al final de este mensaje.
Los esperamos.

Olimpia Lombardi


Why (and how) to question identity in Quantum Mechanics?



Décio Krause

Department of Philosophy

Federal University of Santa Catarina

Florianópolis, SC - Brazil

www.cf.ufsc.br/~dkrause



It is a fact that quantum mechanics (QM) can be developed within a
mathematical framework involving the standard theory of identity (STI). It
has been treated this way ever. But the implications of STI wouldn't go
unnoticed by philosophers interested in foundations. The main consequence
of STI is that every object is an individual, in the sense of being
distinct from any "other" individual. This is a theorem of the underlying
logic, mainly if we are dealing with finitely many objects, as physics
seems to do. Hence, in particular, Leibniz Principle of the Identity of
Indiscernibles is a theorem, and cannot be questioned (under the hypothesis
of consistency). But QM seems to present us situations where quanta cannot
be distinguished in any way, as entangled systems seem to show. Before
measurement, we cannot speak of the individuality of the involved objects.
Thus, logic (that is, the "classical" underlying mathematical apparatus)
forces us to assume that there are "logical" hidden variables of some kind,
for if the differentiation of quanta cannot be done by physics, it is a
result of the underlying logic. In my work I have trying to find a way to
assume a metaphysics of "non-individuals", entities that defy STI, but that
can be collected into amounts having a cardinal but not an associated
ordinal (that is, there may be many of them, but they sometimes cannot be
discerned in any way, counted, put in some order, etc.). The conclusion is
that STI brings inconveniences for the foundational analysis of QM. What I
propose is to build a QM within a different mathematical framework where
STI doesn't hold, where quanta can be treated as legitimate indiscernible
things, without the usual mathematical tricks of assuming permutational
symmetries of a kind.



Interpreting the Afshar Setup and other Experiments in Quantum Physics



Osvaldo Pessoa Jr.

Depto. Filosofia – FFLCH –

Universidade de São Paulo

opessoa en usp.br



Interpretations of quantum theory may be classified according to an
epistemological criterion (positivist or realist) and an ontological one
(corpuscular, undulatory, dualist, or without ontology), besides an
intentional-emotional aspect. We characterize five general groups of
interpretations, and analyze how they explain certain basic experiments.
Special emphasis will be given to the Afshar experiment, and the
refinements it introduces to the complementarity interpretation.

http://en.wikipedia.org/wiki/Afshar_experiment
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