{"title":"Is The Internal Entropy of F(R)-Gravity Really An Entropy?","authors":"Bohuslav Matouš","doi":"10.1007/s10773-025-05957-z","DOIUrl":null,"url":null,"abstract":"<div><p>This paper connects two methods for finding the functional of entropy in <i>F</i>(<i>R</i>)-Gravity: Padmanabhan’s and Hammad’s. The resulting approach is simple to follow and yields the expected entropy functional. This functional can be separated into two parts. The part unknown in General Relativity is identified with internally developed entropy. This paper points on incompatibility between the internal entropy found from the entropy functional and the entropy found using conventional approach from equations of motion.</p></div>","PeriodicalId":597,"journal":{"name":"International Journal of Theoretical Physics","volume":"64 4","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Theoretical Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10773-025-05957-z","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This paper connects two methods for finding the functional of entropy in F(R)-Gravity: Padmanabhan’s and Hammad’s. The resulting approach is simple to follow and yields the expected entropy functional. This functional can be separated into two parts. The part unknown in General Relativity is identified with internally developed entropy. This paper points on incompatibility between the internal entropy found from the entropy functional and the entropy found using conventional approach from equations of motion.
期刊介绍：
International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields. Dedicated to the unification of the latest physics research, this journal seeks to map the direction of future research by original work in traditional physics like general relativity, quantum theory with relativistic quantum field theory,as used in particle physics, and by fresh inquiry into quantum measurement theory, and other similarly fundamental areas, e.g. quantum geometry and quantum logic, etc.
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