Amit Samaddar , S. Surendra Singh , Shah Muhammad , Euaggelos E. Zotos
{"title":"f(Q,C)引力下裂痕宇宙学模型的行为","authors":"Amit Samaddar , S. Surendra Singh , Shah Muhammad , Euaggelos E. Zotos","doi":"10.1016/j.nuclphysb.2024.116643","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, the Universe's rip cosmology theories have been provided for the <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo></math></span> gravity theory, where <em>Q</em> and <em>C</em> stand for the non-metricity scalar and boundary term. We assume <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo><mo>=</mo><mi>α</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msup><mo>+</mo><mi>β</mi><mi>C</mi></math></span> and analyze the nature of the physical parameters for the Little Rip (LR), Big Rip (BR) and Pseudo Rip (PR) models. In the LR and PR models, the EoS parameter exhibits phantom characteristics but remains closely aligned with the ΛCDM line. The non-metricity term <em>Q</em> has direct effect on the rip models. After investigating the energy conditions, we recognise that our model violates the strong energy constraint. Avoiding singularity situations has been noted in all of these accelerated models. The characteristics of the jerk and snap parameters have been investigated. Our model provides an effective description of the Universe's evolutionary history and fits well with contemporary cosmic data.</p></div>","PeriodicalId":54712,"journal":{"name":"Nuclear Physics B","volume":"1006 ","pages":"Article 116643"},"PeriodicalIF":2.5000,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0550321324002098/pdfft?md5=16e080c48c515206f8709bf77af374e9&pid=1-s2.0-S0550321324002098-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Behaviours of rip cosmological models in f(Q,C) gravity\",\"authors\":\"Amit Samaddar , S. Surendra Singh , Shah Muhammad , Euaggelos E. Zotos\",\"doi\":\"10.1016/j.nuclphysb.2024.116643\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In this study, the Universe's rip cosmology theories have been provided for the <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo></math></span> gravity theory, where <em>Q</em> and <em>C</em> stand for the non-metricity scalar and boundary term. We assume <span><math><mi>f</mi><mo>(</mo><mi>Q</mi><mo>,</mo><mi>C</mi><mo>)</mo><mo>=</mo><mi>α</mi><msup><mrow><mi>Q</mi></mrow><mrow><mi>n</mi></mrow></msup><mo>+</mo><mi>β</mi><mi>C</mi></math></span> and analyze the nature of the physical parameters for the Little Rip (LR), Big Rip (BR) and Pseudo Rip (PR) models. In the LR and PR models, the EoS parameter exhibits phantom characteristics but remains closely aligned with the ΛCDM line. The non-metricity term <em>Q</em> has direct effect on the rip models. After investigating the energy conditions, we recognise that our model violates the strong energy constraint. Avoiding singularity situations has been noted in all of these accelerated models. The characteristics of the jerk and snap parameters have been investigated. Our model provides an effective description of the Universe's evolutionary history and fits well with contemporary cosmic data.</p></div>\",\"PeriodicalId\":54712,\"journal\":{\"name\":\"Nuclear Physics B\",\"volume\":\"1006 \",\"pages\":\"Article 116643\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-08-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0550321324002098/pdfft?md5=16e080c48c515206f8709bf77af374e9&pid=1-s2.0-S0550321324002098-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear Physics B\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0550321324002098\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, PARTICLES & FIELDS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear Physics B","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0550321324002098","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, PARTICLES & FIELDS","Score":null,"Total":0}
Behaviours of rip cosmological models in f(Q,C) gravity
In this study, the Universe's rip cosmology theories have been provided for the gravity theory, where Q and C stand for the non-metricity scalar and boundary term. We assume and analyze the nature of the physical parameters for the Little Rip (LR), Big Rip (BR) and Pseudo Rip (PR) models. In the LR and PR models, the EoS parameter exhibits phantom characteristics but remains closely aligned with the ΛCDM line. The non-metricity term Q has direct effect on the rip models. After investigating the energy conditions, we recognise that our model violates the strong energy constraint. Avoiding singularity situations has been noted in all of these accelerated models. The characteristics of the jerk and snap parameters have been investigated. Our model provides an effective description of the Universe's evolutionary history and fits well with contemporary cosmic data.
期刊介绍：
Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
