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Journal ArticleDOI

The Formalism of Quantum Theory: An Objective Description of Reality?

Dennis Dieks
- 01 Jan 1988 - 
- Vol. 500, Iss: 3, pp 174-190
TLDR
In this paper, the formalism of quantum theory can be given an empirical interpretation (in the sense of a connection with observable phenomena) in the same way as in any other empirical theory, in particular, there is no need to supplement the unitary time evolution governed by a Schrodinger-type of equation with a projection postulate that applies only to measurements.
Abstract
We argue that the formalism of quantum theory can be given an empirical interpretation (in the sense of a connection with observable phenomena) in the same way as in any other empirical theory. In particular, there is no need to supplement the unitary time evolution governed by a Schrodinger-type of equation with a “projection postulate” that applies only to measurements. As a consequence, the quantum formalism has the same status as the formalisms of older physical theories, and is capable of the same philosophical interpretations. The most natural interpretation, we argue, is to conceive of the formalism as an objective – although highly abstract – description of reality. Der Formalismus der Quantentheorie: Eine objective Beschreibung der Wirklichkeit? Wir erortern, das der Formalismus der Quantentheorie empirisch interpretiert werden kann (im Sinne einer. Verbindung mit wahrnehmbaren Erscheinungen) in gleicher Weise wie bei allen anderen empirischen Theorien. Insbesondere ist es nicht notig der unitaren Zeitentwicklung, beherrscht durch eine Schrodingergleichung, ein „Projektionspostulat” beizufugen, das nur fur Messungen zutrifft. Infolgedessen hat der Quantenformalismus den gleichen Status wie die Formalismen von alteren physikalischen Theorien und kann in gleicher Weise philosophisch gedeutet werden. Wir fuhren aus, das die naturlichste Deutung darin besteht, den Formalismus als eine objektive – obwohl sehr abstrakte – Beschreibung der Wirklichkeit aufzufassen.

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Citations
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Journal ArticleDOI

Dynamical reduction models

TL;DR: In this article, the authors present an exhaustive review of the recent attempt to overcome the difficulties that standard quantum mechanics meets in accounting for the measurement (or macro-objectification) problem, an attempt based on the consideration of nonlinear and stochastic modifications of the Schrodinger equation.
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Evidence for the epistemic view of quantum states: A toy theory

TL;DR: The toy theory of as discussed by the authors states that the number of questions about the physical state of a system that are answered must always be equal to the number that are unanswered in a state of maximal knowledge.
Journal ArticleDOI

Einstein, Incompleteness, and the Epistemic View of Quantum States

TL;DR: In this paper, a classification of hidden variable models of quantum theory is presented, and it is shown that the failure of locality can be established through an argument considerably more straightforward than Bell's theorem.
Journal ArticleDOI

The modal interpretation of quantum mechanics and its generalization to density operators

TL;DR: In this article, the modal interpretation of quantum mechanics is generalized to composite systems represented by arbitrary density operators and discussed the interpretation these density operators receive and relate this to the discussion about the interpretation of proper and improper mixtures.
Journal ArticleDOI

Resolution of the measurement problem through decoherence of the quantum state

TL;DR: In this paper, it is pointed out that such "solutions" are unsatisfactory as they stand, and must be supplemented by a new empirical interpretation of the formal state description of quantum mechanics.
References
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Book

The scientific image

TL;DR: In this book van Fraassen develops an alternative to scientific realism by constructing and evaluating three mutually reinforcing theories.

The scientific image

van Fraassen, +1 more
Journal ArticleDOI

Die gegenwärtige Situation in der Quantenmechanik

TL;DR: In this paper, the authors discuss the effect of the Verschrgnkung on the performance of the experimentators in terms of the results of the experiments they conducted, and present an analysis of the verifiability of their results.
Journal ArticleDOI

Pointer Basis of Quantum Apparatus: Into What Mixture Does the Wave Packet Collapse?

TL;DR: The form of the interaction Hamiltonian between the apparatus and its environment is sufficient to determine which observable of the measured quantum system can be considered "recorded" by the apparatus as mentioned in this paper.
Journal ArticleDOI

Quantum mechanics versus macroscopic realism: Is the flux there when nobody looks?

TL;DR: It is shown that the predictions of quantum mechanics are incompatible with the conjunction of two general assumptions which are designated ``macroscopic realism'' and ``noninvasive measurability at the macroscopic level.
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