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- Aerts, D. (1994). Quantum structures, separated physical entities and probability.
Foundations of Physics,24,pp. 1227-1259. doi: 10.1007/BF02148566. download pdf.

Abstract:We prove that if the physical entity S consisting of two separated physical entitie S1 and S2 satisfies the axioms of orthodox quantum mechanics, then at least one of the two subentities is a classical physical entity. This theorem implies that separated quantum entities cannot be described by quantum mechanics. We formulate this theorem in an approach where physical entities are described by the set of their states, and the set of their relevant experiments. We also show that the collection of eigenstate sets forms a closure structure on the set of states, that we call the eigen-closure structure. We derive another closure structure on the set of states by means of the orthogonality relation, and call it the ortho-closure structure, and show that the main axioms of quantum mechanics can be introduced in a very general way by means of these two closure structures. We prove that for a general physical entity, and hence also for a quantum entity, the probabilities can always be explained as being due to the presence of a lack of knowledge about the interaction between the experimental apparatus and the entity.- Aerts, D. (1994). Continuing a quest for the understanding of fundamental physical theories and the pursuit of their elaboration.
Foundations of Physics,24,pp. 1107-1111. doi: 10.1007/BF0205785. download pdf.- Aerts, D. (1994). Quantummechanica. In L. Apostel and F. Verbeure (Eds.),
Verwijdering of Ontmoeting?(pp. 123-142). Kapellen: Pelckmans. download pdf.- Aerts, D. (1994). Het spel van de biomousa: een beeld van ontdekking en creatie. In D. Aerts, L. Apostel, B. De Moor, S. Hellemans, E. Maex, H. Van Belle and J. Van der Veken (Eds.),
Cirkelen om de Wereld, Concrete Invulling van het Wereldbeeldenproject(pp. 19-56). Kapellen: Pelckmans.- Aerts, D., Apostel, L., De Moor, B., Hellemans, S., Maex, E., Van Belle, H. and Van der Veken, J. (1994).
Worldviews, from Fragmentation towards Integration.Brussels: VUBPress. download pdf.- Aerts, D., Apostel, L., De Moor, B., Hellemans, S., Maex, E., Van Belle, H. and Van der Veken, J. (1994).
Cirkelen om de Wereld, Concrete Invulling van het Wereldbeeldenproject.Kapellen: Pelckmans.- Aerts, D. and Durt, T. (1994). Quantum, classical and intermediate: a measurement model. In K. V. Laurikainen, C. Montonen and K. Sunnaborg (Eds.),
Symposium on the Foundations of Modern Physics.Gives Sur Yvettes, France: Editions Frontieres. download pdf.

Abstract:We present a measurement model where the origin of the quantum probabilities lies in the presence of fluctuations between the measurement apparatus and the physical system. First we make a reasoning where we show that the measurement process cannot be described by the unitary Schrodinger evolution only. Afterwards we present our model of measurement and show the necessity of developping a more general structure than orthodox Hilbert space quantum mechanics to resolve the measurement problem.- Aerts, D. and Durt, T. (1994). Quantum, classical and intermediate, an illustrative example.
Foundations of Physics,24,pp. 1353-1369. doi: 10.1007/BF02283037. download pdf.

Abstract:We present a model that allows to build structures that evolve continuously from classical to quantum, and we study the intermediate situations, giving rise to structures that are neither classical nor quantum. We construct the closure structure corresponding to the collection of eigenstate sets of these intermediate situations, and demonstrate how the superposition principle disappears during the transition from quantum to classical. We investigate the validity of the axioms of quantum mechanics for the intermediate situations.

1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990,

1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,