The phase-space view of non-local gravity cosmology
We consider non-local Integral Kernel Theories of Gravity in a homogeneous and isotropic universe background as a possible scenario to drive the cosmic history. In particular, we investigate the cosmological properties of a gravitational action containing the inverse d'Alembert operator of the...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322006098 |
| _version_ | 1798029167688679424 |
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| author | Salvatore Capozziello Rocco D'Agostino Orlando Luongo |
| author_facet | Salvatore Capozziello Rocco D'Agostino Orlando Luongo |
| author_sort | Salvatore Capozziello |
| collection | DOAJ |
| description | We consider non-local Integral Kernel Theories of Gravity in a homogeneous and isotropic universe background as a possible scenario to drive the cosmic history. In particular, we investigate the cosmological properties of a gravitational action containing the inverse d'Alembert operator of the Ricci scalar proposed to improve Einstein's gravity at both high and low-energy regimes. In particular, the dynamics of a physically motivated non-local exponential coupling is analyzed in detail by recasting the cosmological equations as an autonomous system of first-order differential equations with dimensionless variables. Consequently, we study the phase-space domain and its critical points, investigating their stability and main properties. In particular, saddle points and late-time cosmological attractors are discussed in terms of the free parameters of the model. Finally, we discuss the main physical consequences of our approach in view of dark energy behavior and the ΛCDM model. |
| first_indexed | 2024-04-11T19:19:55Z |
| format | Article |
| id | doaj.art-6df1027a5507415db1f211242f558a55 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-11T19:19:55Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-6df1027a5507415db1f211242f558a552022-12-22T04:07:19ZengElsevierPhysics Letters B0370-26932022-11-01834137475The phase-space view of non-local gravity cosmologySalvatore Capozziello0Rocco D'Agostino1Orlando Luongo2Dipartimento di Fisica “E. Pancini”, Università di Napoli “Federico II”, Via Cinthia 9, 80126 Napoli, Italy; Scuola Superiore Meridionale, Largo S. Marcellino 10, 80138 Napoli, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sez. di Napoli, Via Cinthia 9, 80126 Napoli, Italy; Corresponding author.Scuola Superiore Meridionale, Largo S. Marcellino 10, 80138 Napoli, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Sez. di Napoli, Via Cinthia 9, 80126 Napoli, ItalyDipartimento di Matematica, Università di Pisa, Largo B. Pontecorvo, 56127 Pisa, Italy; Università di Camerino, Divisione di Fisica, Via Madonna delle carceri, 62032 Camerino, Italy; NNLOT, Al-Farabi Kazakh National University, Al-Farabi av. 71, 050040 Almaty, KazakhstanWe consider non-local Integral Kernel Theories of Gravity in a homogeneous and isotropic universe background as a possible scenario to drive the cosmic history. In particular, we investigate the cosmological properties of a gravitational action containing the inverse d'Alembert operator of the Ricci scalar proposed to improve Einstein's gravity at both high and low-energy regimes. In particular, the dynamics of a physically motivated non-local exponential coupling is analyzed in detail by recasting the cosmological equations as an autonomous system of first-order differential equations with dimensionless variables. Consequently, we study the phase-space domain and its critical points, investigating their stability and main properties. In particular, saddle points and late-time cosmological attractors are discussed in terms of the free parameters of the model. Finally, we discuss the main physical consequences of our approach in view of dark energy behavior and the ΛCDM model.http://www.sciencedirect.com/science/article/pii/S0370269322006098 |
| spellingShingle | Salvatore Capozziello Rocco D'Agostino Orlando Luongo The phase-space view of non-local gravity cosmology Physics Letters B |
| title | The phase-space view of non-local gravity cosmology |
| title_full | The phase-space view of non-local gravity cosmology |
| title_fullStr | The phase-space view of non-local gravity cosmology |
| title_full_unstemmed | The phase-space view of non-local gravity cosmology |
| title_short | The phase-space view of non-local gravity cosmology |
| title_sort | phase space view of non local gravity cosmology |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322006098 |
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