Gao, Shan (2023) Can the ontology of Bohmian mechanics consists only in particles? The PBR theorem says no.
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Abstract
The meaning of the wave function is an important unresolved issue in Bohmian mechanics. On the one hand, according to the nomological view, the wave function of the universe or the universal wave function is nomological, like a law of nature. On the other hand, the PBR theorem proves that the wave function in quantum mechanics or the effective wave function in Bohmian mechanics is ontic, representing the ontic state of a physical system in the universe. It is usually thought that the nomological view of the universal wave function is compatible with the ontic view of the effective wave function, and thus the PBR theorem has no implications for the nomological view. In this paper, I argue that this is not the case, and these two views are in fact incompatible. This means that if the effective wave function is ontic as the PBR theorem proves, then the universal wave function cannot be nomological, and the ontology of Bohmian mechanics cannot consist only in particles. This incompatibility result holds true not only for Humeanism and dispositionalism but also for primitivism about laws of nature, which attributes a fundamental ontic role to the universal wave function. Moreover, I argue that although the nomological view can be held by rejecting one key assumption of the PBR theorem, the rejection will lead to serious problems, such as that the results of measurements and their probabilities cannot be explained in ontology in Bohmian mechanics. Finally, I briefly discuss three psi-ontologies, namely a physical field in a fundamental high-dimensional space, a multi-field in three-dimensional space, and RDMP (Random Discontinuous Motion of Particles) in three-dimensional space, and argue that the RDMP ontology can answer the objections to the $\psi$-ontology raised by the proponents of the nomological view.
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| Item Type: | Published Article or Volume | ||||||
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| Keywords: | Bohmian mechanics; wave function; nomological view; PBR theorem; psi-ontic view; particles | ||||||
| Subjects: | Specific Sciences > Physics > Fields and Particles Specific Sciences > Physics > Quantum Mechanics |
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| Depositing User: | Prof. Shan Gao | ||||||
| Date Deposited: | 08 Nov 2023 00:00 | ||||||
| Last Modified: | 08 Nov 2023 00:00 | ||||||
| Item ID: | 22741 | ||||||
| Official URL: | https://link.springer.com/article/10.1007/s10701-0... | ||||||
| DOI or Unique Handle: | 10.1007/s10701-023-00731-9 | ||||||
| Subjects: | Specific Sciences > Physics > Fields and Particles Specific Sciences > Physics > Quantum Mechanics |
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| Date: | 7 November 2023 | ||||||
| URI: | https://philsci-archive.pitt.edu/id/eprint/22741 |
Available Versions of this Item
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Can the ontology of Bohmian mechanics consists only in particles? The PBR theorem says no. (deposited 05 Dec 2022 14:31)
- Can the ontology of Bohmian mechanics consists only in particles? The PBR theorem says no. (deposited 08 Nov 2023 00:00) [Currently Displayed]
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