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A possibility to solve the problems with quantizing gravity
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2013 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 725, no 4-5, 473-476 p.Article in journal (Refereed) Published
Abstract [en]

It is generally believed that quantum gravity is necessary to resolve the known tensions between general relativity and the quantum field theories of the standard model. Since perturbatively quantized gravity is non-renormalizable, the problem how to unify all interactions in a common framework has been open since the 1930s. Here, I propose a possibility to circumvent the known problems with quantizing gravity, as well as the known problems with leaving it unquantized: By changing the prescription for second quantization, a perturbative quantization of gravity is sufficient as an effective theory because matter becomes classical before the perturbative expansion breaks down. This is achieved by considering the vanishing commutator between a field and its conjugated momentum as a symmetry that is broken at low temperatures, and by this generates the quantum phase that we currently live in, while at high temperatures Planck's constant goes to zero.

Place, publisher, year, edition, pages
2013. Vol. 725, no 4-5, 473-476 p.
Keyword [en]
Quantum gravity, Semi-classical gravity
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-95079DOI: 10.1016/j.physletb.2013.07.037ISI: 000324223100046OAI: diva2:658689


Available from: 2013-10-22 Created: 2013-10-21 Last updated: 2013-10-22Bibliographically approved

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Hossenfelder, Sabine
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