Quantum Weyl invariance and cosmology

Quantum Weyl invariance and cosmology

Equations for cosmological evolution are formulated in a Weyl invariant formalism to take into account possible Weyl anomalies. Near two dimensions, the renormalized cosmological term leads to a nonlocal energy-momentum tensor and a slowly decaying vacuum energy. A natural generalization to four dim...

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Main Author: Atish Dabholkar
Format: Article
Language:English
Published: Elsevier 2016-09-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269316302878
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spelling doaj-8c50cefdf18f4b348048311b189024e52020-11-24T23:24:45ZengElsevierPhysics Letters B0370-26931873-24452016-09-01760C313510.1016/j.physletb.2016.06.034Quantum Weyl invariance and cosmologyAtish Dabholkar0International Centre for Theoretical Physics, ICTP-UNESCO, Strada Costiera 11, Trieste 34151, ItalyEquations for cosmological evolution are formulated in a Weyl invariant formalism to take into account possible Weyl anomalies. Near two dimensions, the renormalized cosmological term leads to a nonlocal energy-momentum tensor and a slowly decaying vacuum energy. A natural generalization to four dimensions implies a quantum modification of Einstein field equations at long distances. It offers a new perspective on time-dependence of couplings and naturalness with potentially far-reaching consequences for the cosmological constant problem, inflation, and dark energy.http://www.sciencedirect.com/science/article/pii/S0370269316302878
collection DOAJ
language English
format Article
sources DOAJ
author Atish Dabholkar
spellingShingle Atish Dabholkar
Quantum Weyl invariance and cosmology
Physics Letters B
author_facet Atish Dabholkar
author_sort Atish Dabholkar
title Quantum Weyl invariance and cosmology
title_short Quantum Weyl invariance and cosmology
title_full Quantum Weyl invariance and cosmology
title_fullStr Quantum Weyl invariance and cosmology
title_full_unstemmed Quantum Weyl invariance and cosmology
title_sort quantum weyl invariance and cosmology
publisher Elsevier
series Physics Letters B
issn 0370-2693
1873-2445
publishDate 2016-09-01
description Equations for cosmological evolution are formulated in a Weyl invariant formalism to take into account possible Weyl anomalies. Near two dimensions, the renormalized cosmological term leads to a nonlocal energy-momentum tensor and a slowly decaying vacuum energy. A natural generalization to four dimensions implies a quantum modification of Einstein field equations at long distances. It offers a new perspective on time-dependence of couplings and naturalness with potentially far-reaching consequences for the cosmological constant problem, inflation, and dark energy.
url http://www.sciencedirect.com/science/article/pii/S0370269316302878
work_keys_str_mv AT atishdabholkar quantumweylinvarianceandcosmology
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