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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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. |
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http://www.sciencedirect.com/science/article/pii/S0370269316302878 |
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AT atishdabholkar quantumweylinvarianceandcosmology |
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