Quantum space-time without observers: Ontological clarity and the conceptual foundations of quantum gravity
Feb, 199922 pages
Part of Physics meets philosophy at the Planck scale: Contemporary theories in quantum gravity, 275-289
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- quant-ph/9902018 [quant-ph]
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Abstract:
We explore the possibility of a Bohmian approach to the problem of finding a quantum theory incorporating gravitational phenomena. The major conceptual problems of canonical quantum gravity are the problem of time and the problem of diffeomorphism invariant observables. We find that these problems are artifacts of the subjectivity and vagueness inherent in the framework of orthodox quantum theory. When we insist upon ontological clarity---the distinguishing characteristic of a Bohmian approach---these conceptual problems vanish. We shall also discuss the implications of a Bohmian perspective for the significance of the wave function, concluding with unbridled speculation as to why the universe should be governed by laws so apparently bizarre as those of quantum mechanics.Note:
- To appear in 'Physics Meets Philosophy at the Planck Scale', eds. by C. Callender and N. Huggett (Cambridge University Press) •
- 22 pages, to appear in ``Physics meets philosophy at the Planck scale,'' edited by C. Callender and N. Huggett (Cambridge University Press)
- space-time
- quantum space
- quantum gravity
- quantum mechanics: wave function
- diffeomorphism: invariance
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