{"title":"Inflection point of coupled quintessence","authors":"Jaskirat Kaur , S.D. Pathak , Vikash Kumar Ojha , Maxim Yu Khlopov","doi":"10.1016/j.astropartphys.2024.102926","DOIUrl":null,"url":null,"abstract":"<div><p>In this paper, we investigate the behavior of coupled quintessence at inflection point in the accelerated expansion of the universe. We consider spatially homogeneous quintessence coupled with the matter with two coupling parameters as <span><math><mrow><mi>Q</mi><mo>=</mo><mn>3</mn><mi>α</mi><mi>H</mi><msub><mrow><mi>ρ</mi></mrow><mrow><mi>m</mi></mrow></msub></mrow></math></span> and <span><math><mrow><mi>Q</mi><mo>=</mo><mn>3</mn><mi>β</mi><mover><mrow><msub><mrow><mi>ρ</mi></mrow><mrow><mi>m</mi></mrow></msub></mrow><mrow><mo>̇</mo></mrow></mover></mrow></math></span>. We obtain the inflection point for the power law form of potential <span><math><mrow><mi>V</mi><mrow><mo>(</mo><mi>ϕ</mi><mo>)</mo></mrow><mo>=</mo><msub><mrow><mi>V</mi></mrow><mrow><mn>3</mn></mrow></msub><msup><mrow><mrow><mo>(</mo><mi>ϕ</mi><mo>−</mo><msub><mrow><mi>ϕ</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>)</mo></mrow></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> and its generalized form in two coupled quintessence models.</p></div>","PeriodicalId":55439,"journal":{"name":"Astroparticle Physics","volume":"157 ","pages":"Article 102926"},"PeriodicalIF":4.2000,"publicationDate":"2024-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astroparticle Physics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927650524000033","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
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Abstract
In this paper, we investigate the behavior of coupled quintessence at inflection point in the accelerated expansion of the universe. We consider spatially homogeneous quintessence coupled with the matter with two coupling parameters as and . We obtain the inflection point for the power law form of potential and its generalized form in two coupled quintessence models.
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Astroparticle Physics publishes experimental and theoretical research papers in the interacting fields of Cosmic Ray Physics, Astronomy and Astrophysics, Cosmology and Particle Physics focusing on new developments in the following areas: High-energy cosmic-ray physics and astrophysics; Particle cosmology; Particle astrophysics; Related astrophysics: supernova, AGN, cosmic abundances, dark matter etc.; Gravitational waves; High-energy, VHE and UHE gamma-ray astronomy; High- and low-energy neutrino astronomy; Instrumentation and detector developments related to the above-mentioned fields.
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