Journal
REPORTS ON PROGRESS IN PHYSICS
Volume 81, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6633/aa8e64
Keywords
cosmology; dark energy; field theory; modified gravity
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Funding
- EU Horizon research and innovation programme under the Marie-Sklodowska grant [690575]
- COST (European Cooperation in Science and Technology) [CA15117]
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Explaining the origin of the acceleration of the expansion of the Universe remains as challenging as ever. In this review, we present different approaches from dark energy to modified gravity. We also emphasize the quantum nature of the problem and the need for an explanation which should violate Weinberg's no go theorem. This might involve a self-tuning mechanism or the acausal sequestering of the vacuum energy. Laboratory tests of the coupling to matter of nearly massless scalar fields, which could be one of the features required to explain the cosmic acceleration, are also reviewed.
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