Addressing Cosmological Tensions by Non-Local Gravity
Alternative cosmological models have been under deep scrutiny in recent years, aiming to address the main shortcomings of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="normal">Λ&...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/9/1/27 |
| _version_ | 1797436612415586304 |
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| author | Filippo Bouché Salvatore Capozziello Vincenzo Salzano |
| author_facet | Filippo Bouché Salvatore Capozziello Vincenzo Salzano |
| author_sort | Filippo Bouché |
| collection | DOAJ |
| description | Alternative cosmological models have been under deep scrutiny in recent years, aiming to address the main shortcomings of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="normal">Λ</mi></semantics></math></inline-formula>CDM model. Moreover, as the accuracy of cosmological surveys improved, new tensions have risen between the model-dependent analysis of the Cosmic Microwave Background and lower redshift probes. Within this framework, we review two quantum-inspired non-locally extended theories of gravity, whose main cosmological feature is a geometrically driven accelerated expansion. The models are especially investigated in light of the Hubble and growth tension, and promising features emerge for the Deser–Woodard one. On the one hand, the cosmological analysis of the phenomenological formulation of the model shows a lowered growth of structures but an equivalent background with respect to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="normal">Λ</mi></semantics></math></inline-formula>CDM. On the other hand, the study of the lensing features at the galaxy cluster scale of a new formulation of non-local cosmology, based on Noether symmetries, makes room for the possibility of alleviating both the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>H</mi><mn>0</mn></msub></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>σ</mi><mn>8</mn></msub></semantics></math></inline-formula> tension. However, the urgent need for a screening mechanism arises for this non-local theory of gravity. |
| first_indexed | 2024-03-09T11:05:08Z |
| format | Article |
| id | doaj.art-6f3f518b880f488b860251a4832ea0be |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-03-09T11:05:08Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-6f3f518b880f488b860251a4832ea0be2023-12-01T00:59:06ZengMDPI AGUniverse2218-19972022-12-01912710.3390/universe9010027Addressing Cosmological Tensions by Non-Local GravityFilippo Bouché0Salvatore Capozziello1Vincenzo Salzano2Scuola Superiore Meridionale, Largo S. Marcellino 10, I-80138 Napoli, ItalyScuola Superiore Meridionale, Largo S. Marcellino 10, I-80138 Napoli, ItalyInstitute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, PolandAlternative cosmological models have been under deep scrutiny in recent years, aiming to address the main shortcomings of the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="normal">Λ</mi></semantics></math></inline-formula>CDM model. Moreover, as the accuracy of cosmological surveys improved, new tensions have risen between the model-dependent analysis of the Cosmic Microwave Background and lower redshift probes. Within this framework, we review two quantum-inspired non-locally extended theories of gravity, whose main cosmological feature is a geometrically driven accelerated expansion. The models are especially investigated in light of the Hubble and growth tension, and promising features emerge for the Deser–Woodard one. On the one hand, the cosmological analysis of the phenomenological formulation of the model shows a lowered growth of structures but an equivalent background with respect to <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mi mathvariant="normal">Λ</mi></semantics></math></inline-formula>CDM. On the other hand, the study of the lensing features at the galaxy cluster scale of a new formulation of non-local cosmology, based on Noether symmetries, makes room for the possibility of alleviating both the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>H</mi><mn>0</mn></msub></semantics></math></inline-formula> and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msub><mi>σ</mi><mn>8</mn></msub></semantics></math></inline-formula> tension. However, the urgent need for a screening mechanism arises for this non-local theory of gravity.https://www.mdpi.com/2218-1997/9/1/27Hubble tensiongrowth tensiondark energyalternative cosmological modelsnon-local gravityNoether symmetries |
| spellingShingle | Filippo Bouché Salvatore Capozziello Vincenzo Salzano Addressing Cosmological Tensions by Non-Local Gravity Universe Hubble tension growth tension dark energy alternative cosmological models non-local gravity Noether symmetries |
| title | Addressing Cosmological Tensions by Non-Local Gravity |
| title_full | Addressing Cosmological Tensions by Non-Local Gravity |
| title_fullStr | Addressing Cosmological Tensions by Non-Local Gravity |
| title_full_unstemmed | Addressing Cosmological Tensions by Non-Local Gravity |
| title_short | Addressing Cosmological Tensions by Non-Local Gravity |
| title_sort | addressing cosmological tensions by non local gravity |
| topic | Hubble tension growth tension dark energy alternative cosmological models non-local gravity Noether symmetries |
| url | https://www.mdpi.com/2218-1997/9/1/27 |
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