{"title":"Cosmic dynamics unveiled in Chern–Simons modified gravity with holographic dark energy model","authors":"Sarfraz Ali, Muhammad Awais, Muhammad Hasnain","doi":"10.1007/s12648-024-03243-y","DOIUrl":null,"url":null,"abstract":"<p>This study provides a comprehensive analysis of the Friedmann–Robertson–Walker model within Chern–Simons modified gravity, incorporating the holographic dark energy model. The scale factor, deceleration parameter, Hubble parameter, and cosmological constants (<span>\\(\\Lambda \\)</span> and <i>G</i>) are examined. The findings help to distinguish between models of acceleration and deceleration, supporting recent data that indicate an accelerating universe. The decreasing trend observed in the cosmological constant <span>\\(\\Lambda (t)\\)</span> aligns with type Ia supernovae observations. Additionally, the observed correlation between the gravitational constant <i>G</i>(<i>t</i>) and cosmic time supports specific critical density assumptions. State finder parameters (<i>r</i>, <i>s</i>) offer insights into various cosmological scenarios. Overall, this study advances our understanding of the universe’s evolving nature under the FRW model with Chern–Simons modified gravity.</p>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1007/s12648-024-03243-y","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study provides a comprehensive analysis of the Friedmann–Robertson–Walker model within Chern–Simons modified gravity, incorporating the holographic dark energy model. The scale factor, deceleration parameter, Hubble parameter, and cosmological constants (\(\Lambda \) and G) are examined. The findings help to distinguish between models of acceleration and deceleration, supporting recent data that indicate an accelerating universe. The decreasing trend observed in the cosmological constant \(\Lambda (t)\) aligns with type Ia supernovae observations. Additionally, the observed correlation between the gravitational constant G(t) and cosmic time supports specific critical density assumptions. State finder parameters (r, s) offer insights into various cosmological scenarios. Overall, this study advances our understanding of the universe’s evolving nature under the FRW model with Chern–Simons modified gravity.
期刊介绍:
Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.