Quantum-Gravity Screening Effect of the Cosmological Constant in the DeSitter Space-Time
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F20%3AA0000079" target="_blank" >RIV/47813059:19630/20:A0000079 - isvavai.cz</a>
Result on the web
<a href="https://www.mdpi.com/2073-8994/12/4/531" target="_blank" >https://www.mdpi.com/2073-8994/12/4/531</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/sym12040531" target="_blank" >10.3390/sym12040531</a>
Alternative languages
Result language
angličtina
Original language name
Quantum-Gravity Screening Effect of the Cosmological Constant in the DeSitter Space-Time
Original language description
Small-amplitude quantum-gravity periodic perturbations of the metric tensor, occurring in sequences of phase-shifted oscillations, are investigated for vacuum conditions and in the context of the manifestly-covariant theory of quantum gravity. The theoretical background is provided by the Hamiltonian representation of the quantum hydrodynamic equations yielding, in turn, quantum modifications of the Einstein field equations. It is shown that in the case of the DeSitter space-time sequences of small-size periodic perturbations with prescribed frequency are actually permitted, each one with its characteristic initial phase. The same perturbations give rise to non-linear modifications of the Einstein field equations in terms of a suitable stochastic-averaged and divergence-free quantum stress-energy tensor. As a result, a quantum-driven screening effect arises which is shown to affect the magnitude of the cosmological constant. Observable features on the DeSitter space-time solution and on the graviton mass estimate are pointed out.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10300 - Physical sciences
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Symmetry
ISSN
2073-8994
e-ISSN
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Volume of the periodical
12
Issue of the periodical within the volume
4
Country of publishing house
CH - SWITZERLAND
Number of pages
17
Pages from-to
„531-1“-„531-17“
UT code for WoS article
000540222200042
EID of the result in the Scopus database
2-s2.0-85084614976