Wallace, David (2021) Quantum Gravity at Low Energies. [Preprint]
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Abstract
I provide a conceptually-focused presentation of `low-energy quantum gravity' (LEQG), the effective quantum field theory obtained from general relativity and which provides a well-defined theory of quantum gravity at energies well below the Planck scale. I emphasize the extent to which some such theory is required by the abundant observational evidence in astrophysics and cosmology for situations which require a simultaneous treatment of quantum-mechanical and gravitational effects, contra the often-heard claim that all observed phenomena can be accounted for either by classical gravity or by non-gravitational quantum mechanics, and I give a detailed account of the way in which a treatment of the theory as fluctuations on a classical background emerges as an approximation to the underlying theory rather than being put in by hand. I discuss the search for a Planck-scale quantum-gravity theory from the perspective of LEQG and give an introduction to the Cosmological Constant problem as it arises within LEQG.
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| Item Type: | Preprint | ||||||
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| Keywords: | quantum gravity quantum field theory effective field theory cosmology cosmological constant problem dark energy | ||||||
| Subjects: | Specific Sciences > Physics > Cosmology Specific Sciences > Physics > Fields and Particles Specific Sciences > Physics > Quantum Gravity Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Relativity Theory |
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| Depositing User: | Professor David Wallace | ||||||
| Date Deposited: | 27 Dec 2021 23:57 | ||||||
| Last Modified: | 27 Dec 2021 23:57 | ||||||
| Item ID: | 20049 | ||||||
| Subjects: | Specific Sciences > Physics > Cosmology Specific Sciences > Physics > Fields and Particles Specific Sciences > Physics > Quantum Gravity Specific Sciences > Physics > Quantum Field Theory Specific Sciences > Physics > Relativity Theory |
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| Date: | December 2021 | ||||||
| URI: | https://philsci-archive.pitt.edu/id/eprint/20049 |
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