发布求助
文献互助 智能选刊 最新文献

International Journal of Modern Physics D最新文献

筛选
英文 中文
Reheating constraints in modified natural inflation with the decaying inflaton 具有衰减充气的修正自然充气中的再热约束
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-03-17 DOI: 10.1142/s0218271823500359
Yusmantoro, Arifin Achmad, Rian Julianto
{"title":"Reheating constraints in modified natural inflation with the decaying inflaton","authors":"Yusmantoro, Arifin Achmad, Rian Julianto","doi":"10.1142/s0218271823500359","DOIUrl":"https://doi.org/10.1142/s0218271823500359","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41906099","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
Correlation of structure growth index with current cosmic acceleration: constraints on dark energy models 结构增长指数与当前宇宙加速度的相关性:对暗能量模型的约束
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-03-16 DOI: 10.1142/S0218271823500360
G. Panotopoulos, G. Barnert, L. Campusano
{"title":"Correlation of structure growth index with current cosmic acceleration: constraints on dark energy models","authors":"G. Panotopoulos, G. Barnert, L. Campusano","doi":"10.1142/S0218271823500360","DOIUrl":"https://doi.org/10.1142/S0218271823500360","url":null,"abstract":"We study dynamical dark energy models within Einstein's theory by means of matter perturbations and the growth index $gamma$. Within four-dimensional General Relativity, we assume that dark energy does not cluster, and we adopt a linear ansatz for the growth index to investigate its impact on the deceleration parameter, $q$, and on the dark energy equation-of-state parameter, $w$. Following this approach, we identify a relationship between $q_0$ (today's value of $q$) and $gamma$, which to the best of our knowledge is new. For $w(z)$, we find that in most of the cases considered it crosses the -1 line (quintom) ending at a present day value $w_0>-1$. Furthermore, we show that an analytic expression for $w(z)$ may be obtained in the form of order (4,4) (or higher) Pad{'e} parameterizations.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42123914","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
Theoretical analysis on the Barrow holographic dark energy in the Finsler-Randers Cosmology 芬斯勒-兰德斯宇宙论中巴罗全息暗能量的理论分析
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-23 DOI: 10.1142/s0218271823500293
Wenyu Feng, Weiqiang Yang, Bo Jiang, Yitao Wang, Tianyi Han, Yabo Wu
{"title":"Theoretical analysis on the Barrow holographic dark energy in the Finsler-Randers Cosmology","authors":"Wenyu Feng, Weiqiang Yang, Bo Jiang, Yitao Wang, Tianyi Han, Yabo Wu","doi":"10.1142/s0218271823500293","DOIUrl":"https://doi.org/10.1142/s0218271823500293","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44126326","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
Reconstruction and dynamical Aspects of Bouncing scenarios in f(T,𝒯 ) Gravity f(T, T)重力下弹跳场景的重建及其动力学方面
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-23 DOI: 10.1142/s021827182350027x
M. Zubair, M. Farooq
{"title":"Reconstruction and dynamical Aspects of Bouncing scenarios in f(T,𝒯 ) Gravity","authors":"M. Zubair, M. Farooq","doi":"10.1142/s021827182350027x","DOIUrl":"https://doi.org/10.1142/s021827182350027x","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45794665","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
Orbital precession and other properties of two-body motion in the presence of dark energy 暗能量存在下两体运动的轨道进动和其他性质
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-23 DOI: 10.1142/s021827182350030x
G. Bisnovatyi-Kogan, M. Merafina
{"title":"Orbital precession and other properties of two-body motion in the presence of dark energy","authors":"G. Bisnovatyi-Kogan, M. Merafina","doi":"10.1142/s021827182350030x","DOIUrl":"https://doi.org/10.1142/s021827182350030x","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46033065","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
Gravitational wave production after inflation for a hybrid inflationary model 混合通货膨胀模型通货膨胀后引力波的产生
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-11 DOI: 10.1142/S021827182350075X
Rinsy Thomas, Jobil Thomas, Supin P. Surendran, Minu Joy
{"title":"Gravitational wave production after inflation for a hybrid inflationary model","authors":"Rinsy Thomas, Jobil Thomas, Supin P. Surendran, Minu Joy","doi":"10.1142/S021827182350075X","DOIUrl":"https://doi.org/10.1142/S021827182350075X","url":null,"abstract":"We discuss a cosmological scenario with a stochastic background of gravitational waves sourced by the tensor perturbation due to a hybrid inflationary model with cubic potential. The tensor-to-scalar ratio for the present hybrid inflationary model is obtained as $r approx 0.0006$. Gravitational wave spectrum of this stochastic background, for large-scale CMB modes, $10^{-4}Mpc^{-1}$ to $1Mpc^{-1}$ is studied. The present-day energy spectrum of gravitational waves $Omega_0^{gw}(f)$ is sensitively related to the tensor power spectrum and r which is, in turn, dependent on the unknown physics of the early cosmos. This uncertainty is characterized by two parameters: $hat{n_t}(f)$ logarithmic average over the primordial tensor spectral index and $hat{w}(f)$ logarithmic average over the effective equation of state parameter. Thus, exact constraints in the $hat{w}(f)$, $hat{n_t}(f)$ plane can be obtained by comparing theoretical constraints of our model on r and $Omega_0^{gw}(f)$. We obtain a limit on $hat{w}(10^{-15}Hz)$<$0.33$ around the modes probed by CMB scales.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45848305","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
Electromagnetic vacuum stresses and energy fluxes induced by a cosmic string in de Sitter spacetime 德西特时空中宇宙弦诱导的电磁真空应力和能量通量
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-06 DOI: 10.1142/S0218271823500426
A. Saharian, V. Manukyan, V. Kotanjyan, A. Grigoryan
{"title":"Electromagnetic vacuum stresses and energy fluxes induced by a cosmic string in de Sitter spacetime","authors":"A. Saharian, V. Manukyan, V. Kotanjyan, A. Grigoryan","doi":"10.1142/S0218271823500426","DOIUrl":"https://doi.org/10.1142/S0218271823500426","url":null,"abstract":"For the electromagnetic field in (D+1)-dimensional locally de Sitter (dS) spacetime, we analyze the effects of a generalized cosmic string type defect on the vacuum expectation value of the energy-momentum tensor. For the Bunch-Davies vacuum state, the topological contributions are explicitly extracted in both the diagonal and off-diagonal components. The latter describes the presence of radially directed energy flux in the vacuum state. It vanishes for $D=3$ because of the conformal invariance of the electromagnetic field and is directed towards the cosmic string for $Dgeq 4$ . The topological contributions in the vacuum stresses are anisotropic and, unlike to the geometry of a cosmic string in the Minkowski spacetime, for $D>3$ the stresses along the directions parallel to the string core differ from the energy density. Depending on the planar angle deficit and the distance from the cosmic string, the corresponding expectation values can be either positive or negative. Near the cosmic string the effect of the gravitational field on the diagonal components of the topological part is weak. The spacetime curvature essentially modifies the behavior of the topological terms at proper distances from the cosmic string larger than the dS curvature radius. In that region, the topological contributions in the diagonal components of the energy-momentum tensor decay in inverse proportion to the fourth power of the proper distance and the energy flux density behaves as inverse-fifth power for all values of the spatial dimension $D$. The exception is the energy density in the special case $D=4$.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45555514","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 alteration of the Schwinger effect on Radiatively corrected Higss inflationary Magneto-genesis by axial coupling Schwinger效应对轴向耦合辐射校正Higss膨胀磁成因的影响
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-02-03 DOI: 10.1142/s0218271823500256
M. Kamarpour
{"title":"The alteration of the Schwinger effect on Radiatively corrected Higss inflationary Magneto-genesis by axial coupling","authors":"M. Kamarpour","doi":"10.1142/s0218271823500256","DOIUrl":"https://doi.org/10.1142/s0218271823500256","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":"19 15","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41249702","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
Rotation in vacuum and scalar background: are there alternatives to Newman-Janis algorithm? 真空和标量背景下的旋转：Newman-Janis算法有替代方案吗？
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-01-19 DOI: 10.1142/S0218271823500232
Maxim Makukov, E. Mychelkin
{"title":"Rotation in vacuum and scalar background: are there alternatives to Newman-Janis algorithm?","authors":"Maxim Makukov, E. Mychelkin","doi":"10.1142/S0218271823500232","DOIUrl":"https://doi.org/10.1142/S0218271823500232","url":null,"abstract":"The Newman-Janis algorithm is the standard approach to rotation in general relativity which, in vacuum, builds the Kerr metric from the Schwarzschild spacetime. Recently, we have shown that the same algorithm applied to the Papapetrou antiscalar spacetime produces a rotational metric devoid of horizons and ergospheres. Though exact in the scalar sector, this metric, however, satisfies the Einstein equations only asymptotically. We argue that this discrepancy between geometric and matter parts (essential only inside gravitational radius scale) is caused by the violation of the Hawking-Ellis energy conditions for the scalar energy-momentum tensor. The axial potential functions entering the metrics appear to be of the same form both in vacuum and scalar background, and they also coincide with the linearized Yang-Mills field, which might hint at their common non-gravitational origin. As an alternative to the Kerr-type spacetimes produced by Newman-Janis algorithm we suggest the exact solution obtained by local rotational coordinate transformation from the Schwarzschild spacetime. Then, comparison with the Kerr-type metrics shows that the Lense-Thirring phenomenon might be treated as a coordinate effect, similar to the Coriolis force.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47313622","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
Inhomogeneous Equation of State and its Consequences in a Coupled Fluid Scenario and Realization of Little Rip, Pseudo Rip, and Bounce cosmology 耦合流体情况下的非齐次状态方程及其结果以及小撕裂、伪撕裂和弹跳宇宙学的实现
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-01-17 DOI: 10.1142/s0218271823500207
Gargee Chakraborty, S. Chattopadhyay
{"title":"Inhomogeneous Equation of State and its Consequences in a Coupled Fluid Scenario and Realization of Little Rip, Pseudo Rip, and Bounce cosmology","authors":"Gargee Chakraborty, S. Chattopadhyay","doi":"10.1142/s0218271823500207","DOIUrl":"https://doi.org/10.1142/s0218271823500207","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":" ","pages":""},"PeriodicalIF":2.2,"publicationDate":"2023-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46411963","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信