Backreaction in cosmic screening approach
We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations. An analytical study of these perturbations followed by a numerical evaluation shows that, fi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-04-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269323001314 |
| _version_ | 1797867656238333952 |
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| author | Maxim Eingorn Brianna O'Briant Adjaratou Diouf Alexander Zhuk |
| author_facet | Maxim Eingorn Brianna O'Briant Adjaratou Diouf Alexander Zhuk |
| author_sort | Maxim Eingorn |
| collection | DOAJ |
| description | We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations. An analytical study of these perturbations followed by a numerical evaluation shows that, first, the corresponding average values have a negligible backreaction effect on the Friedmann equations and, second, the second-order correction to the gravitational potential is much less than the first-order quantity. Consequently, the expansion of perturbations into orders of smallness in the cosmic screening approach is correct. |
| first_indexed | 2024-04-09T23:44:45Z |
| format | Article |
| id | doaj.art-4ea9cdb6eb0c458dad2f3ec979f31c3b |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-09T23:44:45Z |
| publishDate | 2023-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-4ea9cdb6eb0c458dad2f3ec979f31c3b2023-03-18T04:40:10ZengElsevierPhysics Letters B0370-26932023-04-01839137797Backreaction in cosmic screening approachMaxim Eingorn0Brianna O'Briant1Adjaratou Diouf2Alexander Zhuk3Department of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USADepartment of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USA; Department of Mechanical and Aerospace Engineering, North Carolina State University, Campus Box 7910, Raleigh, NC 27695, USADepartment of Mathematics and Physics, North Carolina Central University, 1801 Fayetteville St., Durham, NC 27707, USAAstronomical Observatory, Odessa National University, Dvoryanskaya St. 2, Odessa 65082, Ukraine; Center for Advanced Systems Understanding (CASUS), Untermarkt 20, 02826 Görlitz, Germany; Corresponding author.We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations. An analytical study of these perturbations followed by a numerical evaluation shows that, first, the corresponding average values have a negligible backreaction effect on the Friedmann equations and, second, the second-order correction to the gravitational potential is much less than the first-order quantity. Consequently, the expansion of perturbations into orders of smallness in the cosmic screening approach is correct.http://www.sciencedirect.com/science/article/pii/S0370269323001314Inhomogeneous UniverseCosmological perturbationsBackreactionCosmic screening |
| spellingShingle | Maxim Eingorn Brianna O'Briant Adjaratou Diouf Alexander Zhuk Backreaction in cosmic screening approach Physics Letters B Inhomogeneous Universe Cosmological perturbations Backreaction Cosmic screening |
| title | Backreaction in cosmic screening approach |
| title_full | Backreaction in cosmic screening approach |
| title_fullStr | Backreaction in cosmic screening approach |
| title_full_unstemmed | Backreaction in cosmic screening approach |
| title_short | Backreaction in cosmic screening approach |
| title_sort | backreaction in cosmic screening approach |
| topic | Inhomogeneous Universe Cosmological perturbations Backreaction Cosmic screening |
| url | http://www.sciencedirect.com/science/article/pii/S0370269323001314 |
| work_keys_str_mv | AT maximeingorn backreactionincosmicscreeningapproach AT briannaobriant backreactionincosmicscreeningapproach AT adjaratoudiouf backreactionincosmicscreeningapproach AT alexanderzhuk backreactionincosmicscreeningapproach |