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To Quantize or Not to Quantize: Fact and Folklore in Quantum Gravity
Philosophy of Science
Vol. 72, No. 5, Proceedings of the 2004 Biennial Meeting of The Philosophy of Science AssociationPart I: Contributed PapersEdited by Miriam Solomon (December 2005), pp. 777-788
Stable URL: http://www.jstor.org/stable/10.1086/508946
Page Count: 12
You can always find the topics here!Topics: Gravity, Quantum field theory, Spacetime, General relativity, Gravitational fields, Physics, Quantum gravity, Gravitation theory, Degrees of freedom, Einstein equations
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Does the need to find a quantum theory of gravity imply that the gravitational field must be quantized? Physicists working in quantum gravity routinely assume an affirmative answer, often without being aware of the metaphysical commitments that tend to underlie this assumption. The ambition of this article is to probe these commitments and to analyze some recently adduced physical—as opposed to metaphysical—arguments pertinent to the issue of quantization. While there exist good reasons to quantize gravity, as this analysis will show, alternative approaches to gravity challenge the received wisdom. These renegade approaches do not regard gravity as a fundamental force, but rather as effective, i.e., as merely supervening on fundamental physics. I will urge that these alternative accounts at least prove the tenability of an opposition to quantization.
Copyright 2005 by the Philosophy of Science Association. All rights reserved.