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Towards quantum gravity
Version 1
: Received: 17 May 2023 / Approved: 18 May 2023 / Online: 19 May 2023 (08:29:33 CEST)
How to cite: Kruglov, S. Towards quantum gravity. Preprints 2023, 2023051410. https://doi.org/10.20944/preprints202305.1410.v1 Kruglov, S. Towards quantum gravity. Preprints 2023, 2023051410. https://doi.org/10.20944/preprints202305.1410.v1
Abstract
We analyze different approaches to quantum gravity. It is stressed that nonperturbative methods to quantise gravity and the usage of diffeomorphism-invariant variables are very important. We pay attention on the Wheeler--DeWitt equation in the framework of canonical quantum gravity. The Wheeler--DeWitt equation is presented in the first order formalism with the hope that this form can solve some problems such as singularities and the ordering. Also, there is a problem of defining the time.
Keywords
quantum gravity; diffeomorphism-invariant; Wheeler--DeWitt equation; first order formalism
Subject
Physical Sciences, Astronomy and Astrophysics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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