Abstract
Ontic structural realists draw support for their view from fundamental theories in modern physics. Quantum mechanics is uncontroversially regarded as being amongst those theories. In this paper, I defend the idea that quantum mechanics cannot play this role of a fundamental theory without assuming that a solution for the measurement problem is available. I go on to illustrate that, in the light of possible solutions to the measurement problem, the support for ontic structural realism from quantum mechanics becomes disputable. I also argue that resorting to notions of fundamentality that leave the support for ontic structural realism intact presuppose too much aspects of this metaphysical position for the support from quantum mechanics to be considered significant.
Imitation is the sincerest form of flattery cf. Hájek (2007).
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Notes
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Cf. Lam and Esfeld (2012) and references therein.
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The use of the term “underdetermination” in this context is somewhat controversial in philosophy of science. On the other hand, it is also commonplace within the present topic. For a defense of the use of this term I refer to the authority of Fraassen (1991, p. 481): “The phenomena underdetermine the theory. There are in principle alternative developments of science, branching off from ours at every point in history with equal adequacy as models of the phenomena. Only angels could know these alternative sciences, though sometimes we dimly perceive their possibility. The theory in turn underdetermines the interpretation. Each scientific theory, caught in the amber at one definite historical stage of development and formalization, admits many different tenable interpretations. What is the world depicted by science? That is exactly the question we answer with an interpretation and the answer is not unique.”
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The term “hidden variables” has some unfortunate connotations. First of all, the additional variables may be empirically accessible. In fact, in Bohmian mechanics the positions are the variables whose values are revealed by measurements (see also the defense of Bohmian mechanics given by Bell 1982). What is intended here, however, is the question of whether a hidden-variables approach should be entirely empirically equivalent to orthodox QM. And in this sense the additional variables need not stay hidden as well.
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For one, it requires an explication of measurement processes and their outcomes as physical processes. A requirement strongly advocated by Bell (1990).
- 8.
I took this idea from Timpson (2008, p. 590) who posed it as part of a possible defense for Quantum Bayesianism.
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Acknowledgements
The author would like to thank the following people for constructive comments and discussions: D. Dieks, F.A. Muller, J.W. Romeijn, M.P. Seevinck, and two anonymous referees. This work was supported by the NWO (Vidi project nr. 016.114.354).
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Hermens, R. (2014). The Measurement Problem Is Your Problem Too. In: Galavotti, M., Dieks, D., Gonzalez, W., Hartmann, S., Uebel, T., Weber, M. (eds) New Directions in the Philosophy of Science. The Philosophy of Science in a European Perspective, vol 5. Springer, Cham. https://doi.org/10.1007/978-3-319-04382-1_32
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