Synthese 199 (S2):441-467 (2019)

Authors
Rasmus Jaksland
Norwegian University of Science and Technology
Abstract
Must a theory of quantum gravity have some truth to it if it can recover general relativity in some limit of the theory? This paper answers this question in the negative by indicating that general relativity is multiply realizable in quantum gravity. The argument is inspired by spacetime functionalism—multiple realizability being a central tenet of functionalism—and proceeds via three case studies: induced gravity, thermodynamic gravity, and entanglement gravity. In these, general relativity in the form of the Einstein field equations can be recovered from elements that are either manifestly multiply realizable or at least of the generic nature that is suggestive of functions. If general relativity, as argued here, can inherit this multiple realizability, then a theory of quantum gravity can recover general relativity while being completely wrong about the posited microstructure. As a consequence, the recovery of general relativity cannot serve as the ultimate arbiter that decides which theory of quantum gravity that is worthy of pursuit, even though it is of course not irrelevant either qua quantum gravity. Thus, the recovery of general relativity in string theory, for instance, does not guarantee that the stringy account of the world is on the right track; despite sentiments to the contrary among string theorists.
Keywords No keywords specified (fix it)
Categories No categories specified
(categorize this paper)
Reprint years 2021
ISBN(s)
DOI 10.1007/s11229-019-02382-8
Options
Edit this record
Mark as duplicate
Export citation
Find it on Scholar
Request removal from index
Revision history

Download options

PhilArchive copy


Upload a copy of this paper     Check publisher's policy     Papers currently archived: 68,975
External links

Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
Through your library

References found in this work BETA

String Theory and the Scientific Method.Richard Dawid - 2013 - Cambridge University Press.
Emergent Spacetime and Empirical (in) Coherence.Nick Huggett & Christian Wüthrich - 2013 - Studies in History and Philosophy of Modern Physics 44 (3):276-285.

View all 48 references / Add more references

Citations of this work BETA

Add more citations

Similar books and articles

Does Time Exist in Quantum Gravity?Claus Kiefer - 2015 - Zagadnienia Filozoficzne W Nauce 59:7-24.
Quantum Gravity and the Nature of Space and Time.Keizo Matsubara - 2017 - Philosophy Compass 12 (3):e12405.
Have we Lost Spacetime on the Way? Narrowing the Gap between General Relativity and Quantum Gravity.Baptiste Le Bihan & Niels Siegbert Linnemann - 2019 - Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics 65:112-121.
Pre-Socratic Quantum Gravity.Belot Gordon & Earman John - 2001 - In Craig Callender & Nick Huggett (eds.), Physics Meets Philosophy at the Planck Scale. Cambridge University Press. pp. 213--55.
Quantum Gravity.Claus Kiefer - 2004 - Oxford University Press UK.
Why General Relativity Does Need an Interpretation.Gordon Belot - 1996 - Philosophy of Science 63 (3):88.
Quantum Concepts in Space and Time.Roger Penrose & C. J. Isham (eds.) - 1986 - New York ;Oxford University Press.
Quantum Gravity.Carlo Rovelli - 2007 - Cambridge University Press.

Analytics

Added to PP index
2019-09-05

Total views
9 ( #946,771 of 2,498,168 )

Recent downloads (6 months)
1 ( #427,476 of 2,498,168 )

How can I increase my downloads?

Downloads

My notes