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International Journal of Modern Physics D最新文献

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Characterizations of Weakly Ricci-Symmetric Spacetimes and f(ℛ)-Gravity 弱Ricci对称时空和f的特征(ℛ)-重力
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-21 DOI: 10.1142/s0218271823500724
U. De, Dipankar Hazra
{"title":"Characterizations of Weakly Ricci-Symmetric Spacetimes and f(ℛ)-Gravity","authors":"U. De, Dipankar Hazra","doi":"10.1142/s0218271823500724","DOIUrl":"https://doi.org/10.1142/s0218271823500724","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45773137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In Search of the maximum lost momentum 寻找最大的动量损失
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-21 DOI: 10.1142/s0218271823420166
C. Lousto, J. Healy
{"title":"In Search of the maximum lost momentum","authors":"C. Lousto, J. Healy","doi":"10.1142/s0218271823420166","DOIUrl":"https://doi.org/10.1142/s0218271823420166","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42710462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Stability analysis of f(Q) gravity models using Dynamical Systems 用动力系统分析f（Q）重力模型的稳定性
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-13 DOI: 10.1142/s0218271823500712
Pooja Vishwakarma, Parth Shah
{"title":"Stability analysis of f(Q) gravity models using Dynamical Systems","authors":"Pooja Vishwakarma, Parth Shah","doi":"10.1142/s0218271823500712","DOIUrl":"https://doi.org/10.1142/s0218271823500712","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47209407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal radiation of thin accretion disk around Taub-NUT black hole Taub NUT黑洞周围薄吸积盘的热辐射
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-10 DOI: 10.1142/s0218271823500645
Bakhtiyor Narzilloev, B. Ahmedov
{"title":"Thermal radiation of thin accretion disk around Taub-NUT black hole","authors":"Bakhtiyor Narzilloev, B. Ahmedov","doi":"10.1142/s0218271823500645","DOIUrl":"https://doi.org/10.1142/s0218271823500645","url":null,"abstract":"The effects of a gravitomagnetic charge on the thermal radiation properties of a thin accretion disk surrounding a non-rotating black hole are studied. The studied system consists of a non-rotating black hole with a non-zero gravitomagnetic charge and a Novikov–Thorne disk that is thin and optically thick. It is found that the gravitomagnetic charge enhances the gravitational field of the central black hole, resulting in an increase in the event horizon and innermost stable circular orbit (ISCO) radii. However, the maximum flux of radiant energy from the accretion disk is reduced and shifted outward from the central object due to the effect of the gravitomagnetic charge. The thermal profile of the accretion disk also exhibits a similar dependence on the radial coordinate and the gravitomagnetic charge of the black hole. The radiative efficiency of the accretion disk decreases from around 6% to approximately 2% with an increase in the value of the gravitomagnetic charge by [Formula: see text]. The thermal spectra of the accretion disk are also shifted towards lower frequencies, corresponding to the gravitational redshift of electromagnetic radiation coming from the disk, with an increase in the value of the gravitomagnetic charge. One may conclude that the effect of the gravitomagnetic charge is opposite to the effect of black hole spin.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41510986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Essay written for the Gravity Research Foundation 2023 Awards for Essays on Gravitation The Virial Theorem for Retarded gravity 为引力研究基金会2023年引力论文奖撰写的论文。迟钝引力的维里定理
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-07 DOI: 10.1142/s0218271823420130
A. Yahalom
{"title":"Essay written for the Gravity Research Foundation 2023 Awards for Essays on Gravitation The Virial Theorem for Retarded gravity","authors":"A. Yahalom","doi":"10.1142/s0218271823420130","DOIUrl":"https://doi.org/10.1142/s0218271823420130","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46667066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The sound of the event horizon 视界的声音
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-07 DOI: 10.1142/s0218271823420142
R. Konoplya
{"title":"The sound of the event horizon","authors":"R. Konoplya","doi":"10.1142/s0218271823420142","DOIUrl":"https://doi.org/10.1142/s0218271823420142","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47383519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Event horizon detection: Zenith view as seen by falling into a Schwarzschild black hole 视界探测：落入史瓦西黑洞的天顶视图
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-07-04 DOI: 10.1142/s0218271823500700
Y. Iida
{"title":"Event horizon detection: Zenith view as seen by falling into a Schwarzschild black hole","authors":"Y. Iida","doi":"10.1142/s0218271823500700","DOIUrl":"https://doi.org/10.1142/s0218271823500700","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44632297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum black holes as classical space factories 量子黑洞是经典的空间工厂
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-30 DOI: 10.1142/S0218271823500633
A. Iorio, L. Smaldone
{"title":"Quantum black holes as classical space factories","authors":"A. Iorio, L. Smaldone","doi":"10.1142/S0218271823500633","DOIUrl":"https://doi.org/10.1142/S0218271823500633","url":null,"abstract":"Space and matter may both be manifestations of a single fundamental quantum dynamics, as it may become evident during black-hole evaporation. Inspired by the fact that quantum electrodynamics underlies the classical theory of elasticity, that in turn has a natural and well-known geometric description in terms of curvature and torsion, related to topological defects, here we move some necessary steps to find the map from such fundamental quantum level to the emergent level of classical space and quantum matter. We proceed by adapting the boson transformation method of standard quantum field theory to the quantum gravity fundamental scenario and successfully obtain the emergence of curvature and torsion, our main focus here. In doing so, we have been able to overcome difficult issues of interpretation, related to the Goldstone modes for rotational symmetry. In fact, we have been able to apply the boson transformation method to disclinations, to relate them to the spin structure and to give an heuristic derivation of the matter field equation on curved space. We also improve results of previous work on the emergence of geometric tensors from elasticity theory, as the non-Abelian contributions to the torsion and curvature tensors, postulated in those papers, here emerge naturally. More work is necessary to identify the type of gravity theories one can obtain in this way.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46412926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Energy conditions of traversable wormhole in the deformed f(R) gravitational model 变形f（R）引力模型中可遍历虫洞的能量条件
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-28 DOI: 10.1142/s0218271823500657
J. Sadeghi, Saeed Noori Gashti, M. Alipour, M. A. S. Afshar
{"title":"Energy conditions of traversable wormhole in the deformed f(R) gravitational model","authors":"J. Sadeghi, Saeed Noori Gashti, M. Alipour, M. A. S. Afshar","doi":"10.1142/s0218271823500657","DOIUrl":"https://doi.org/10.1142/s0218271823500657","url":null,"abstract":"One of the most important issues in cosmology is the study of a series of hypothetical objects called wormholes. Recently, researchers have studied these hypothetical objects under different conditions. In this paper, we aim to evaluate the traversable wormhole according to a modified [Formula: see text] gravitational model, specifically [Formula: see text], from the perspective of two essential functions in wormhole structure: shape and redshift function. These hypothetical objects can solve Einstein’s equations by tolerating the violation of null energy conditions (NEC). With respect to these concepts, we examine various energy conditions such as the NEC, weak energy condition (WEC), dominant energy condition (DEC) and strong energy condition (SEC) using radial pressure, tangential pressure and energy density obtained from the wormhole equations. Finally, we evaluate different energy conditions by plotting some figures and checking for satisfaction or violation. We will analyze the results and present the conclusions in tables.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45568485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast Radio Bursts signal high-frequency gravitational waves 快速射电暴信号高频引力波
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-26 DOI: 10.1142/s0218271823420105
Ashu Kushwaha, S. Malik, S. Shankaranarayanan
{"title":"Fast Radio Bursts signal high-frequency gravitational waves","authors":"Ashu Kushwaha, S. Malik, S. Shankaranarayanan","doi":"10.1142/s0218271823420105","DOIUrl":"https://doi.org/10.1142/s0218271823420105","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48786290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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