{"title":"引力相互作用与宇宙演化:f(Q,Lm)理论的作用","authors":"M. Sharif , M. Zeeshan Gul , Rida Mahmood","doi":"10.1016/j.hedp.2025.101212","DOIUrl":null,"url":null,"abstract":"<div><div>This manuscript investigates the viable cosmological bounce solutions in the non-metric gravity represented by the function <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span>, where <span><math><mi>Q</mi></math></span> is non-metricity and <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> defines the matter-Lagrangian density. For this purpose, we analyze anisotropic flat metric with a perfect matter distribution to examine the cosmic mysteries. We study the impact of this gravitational proposal on the cosmic evolution by considering two distinct <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> functional forms. Further, we investigate the behavior of different cosmological parameters to investigate the existence of viable cosmological bounce solutions. The analysis shows that the null energy condition is violated, which indicates that the singularity problem can be addressed in this extended theoretical framework. Our findings suggest that this modified gravitational theory provides an alternative framework to standard cosmology, offering insights into gravitational interactions and the early cosmic evolution.</div></div>","PeriodicalId":49267,"journal":{"name":"High Energy Density Physics","volume":"56 ","pages":"Article 101212"},"PeriodicalIF":0.9000,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Gravitational interplay and cosmic evolution: The role of f(Q,Lm) theory\",\"authors\":\"M. Sharif , M. Zeeshan Gul , Rida Mahmood\",\"doi\":\"10.1016/j.hedp.2025.101212\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>This manuscript investigates the viable cosmological bounce solutions in the non-metric gravity represented by the function <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span>, where <span><math><mi>Q</mi></math></span> is non-metricity and <span><math><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> defines the matter-Lagrangian density. For this purpose, we analyze anisotropic flat metric with a perfect matter distribution to examine the cosmic mysteries. We study the impact of this gravitational proposal on the cosmic evolution by considering two distinct <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>Q</mi><mo>,</mo><msub><mrow><mi>L</mi></mrow><mrow><mi>m</mi></mrow></msub><mo>)</mo></mrow></mrow></math></span> functional forms. Further, we investigate the behavior of different cosmological parameters to investigate the existence of viable cosmological bounce solutions. The analysis shows that the null energy condition is violated, which indicates that the singularity problem can be addressed in this extended theoretical framework. Our findings suggest that this modified gravitational theory provides an alternative framework to standard cosmology, offering insights into gravitational interactions and the early cosmic evolution.</div></div>\",\"PeriodicalId\":49267,\"journal\":{\"name\":\"High Energy Density Physics\",\"volume\":\"56 \",\"pages\":\"Article 101212\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2025-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"High Energy Density Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1574181825000400\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, FLUIDS & PLASMAS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"High Energy Density Physics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1574181825000400","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, FLUIDS & PLASMAS","Score":null,"Total":0}
Gravitational interplay and cosmic evolution: The role of f(Q,Lm) theory
This manuscript investigates the viable cosmological bounce solutions in the non-metric gravity represented by the function , where is non-metricity and defines the matter-Lagrangian density. For this purpose, we analyze anisotropic flat metric with a perfect matter distribution to examine the cosmic mysteries. We study the impact of this gravitational proposal on the cosmic evolution by considering two distinct functional forms. Further, we investigate the behavior of different cosmological parameters to investigate the existence of viable cosmological bounce solutions. The analysis shows that the null energy condition is violated, which indicates that the singularity problem can be addressed in this extended theoretical framework. Our findings suggest that this modified gravitational theory provides an alternative framework to standard cosmology, offering insights into gravitational interactions and the early cosmic evolution.
期刊介绍:
High Energy Density Physics is an international journal covering original experimental and related theoretical work studying the physics of matter and radiation under extreme conditions. ''High energy density'' is understood to be an energy density exceeding about 1011 J/m3. The editors and the publisher are committed to provide this fast-growing community with a dedicated high quality channel to distribute their original findings.
Papers suitable for publication in this journal cover topics in both the warm and hot dense matter regimes, such as laboratory studies relevant to non-LTE kinetics at extreme conditions, planetary interiors, astrophysical phenomena, inertial fusion and includes studies of, for example, material properties and both stable and unstable hydrodynamics. Developments in associated theoretical areas, for example the modelling of strongly coupled, partially degenerate and relativistic plasmas, are also covered.