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Article

Evidence of Time Evolution in Quantum Gravity

by 1,† and 2,*,†
1
Institute for Nuclear Problems, Bobruiskaya 11, 220030 Minsk, Belarus
2
Dipartimento di Ingegneria dell’Informazione, Elettronica e Telecomunicazioni, Sapienza Universitá di Roma, Via Eudossiana 18, 00189 Roma, Italy
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Universe 2020, 6(5), 67; https://doi.org/10.3390/universe6050067
Received: 1 April 2020 / Revised: 25 April 2020 / Accepted: 4 May 2020 / Published: 8 May 2020
(This article belongs to the Section Gravitation)
In this paper, we argue that the problem of time is not a crucial issue inherent in the quantum picture of the universe evolution. On the minisuperspace model example with the massless scalar field, we demonstrate four approaches to the description of quantum evolution, which give similar results explicitly. The relevance of these approaches to building a quantum theory of gravity is discussed. View Full-Text
Keywords: quantum cosmology; the problem of the time; initial conditions in the quantum universe; quantum gravity quantum cosmology; the problem of the time; initial conditions in the quantum universe; quantum gravity
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MDPI and ACS Style

Cherkas, S.; Kalashnikov, V. Evidence of Time Evolution in Quantum Gravity. Universe 2020, 6, 67. https://doi.org/10.3390/universe6050067

AMA Style

Cherkas S, Kalashnikov V. Evidence of Time Evolution in Quantum Gravity. Universe. 2020; 6(5):67. https://doi.org/10.3390/universe6050067

Chicago/Turabian Style

Cherkas, Sergey, and Vladimir Kalashnikov. 2020. "Evidence of Time Evolution in Quantum Gravity" Universe 6, no. 5: 67. https://doi.org/10.3390/universe6050067

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