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International Journal of Modern Physics D最新文献

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Dynamical system approach of interacting dark energy models with minimally coupled scalar field 具有最小耦合标量场的相互作用暗能量模型的动力学系统方法
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-23 DOI: 10.1142/s0218271823500621
A. Samaddar, S. S. Singh, Md Khurshid Alam
{"title":"Dynamical system approach of interacting dark energy models with minimally coupled scalar field","authors":"A. Samaddar, S. S. Singh, Md Khurshid Alam","doi":"10.1142/s0218271823500621","DOIUrl":"https://doi.org/10.1142/s0218271823500621","url":null,"abstract":"We investigated the stability condition of [Formula: see text] gravity theory with interacting and noninteracting models by using dynamical system. We assume the [Formula: see text] function as [Formula: see text], where [Formula: see text] is the free parameter. We evaluated the critical points for this model and examined the stability behavior. We found two stable critical points for interacting model. The phase plots for this system are examined and the physical interpretation is discussed. We illustrate all the cosmological parameters such as [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text] at each fixed point and compare the parameters with observational values. Further, we assume hybrid scale factor and the equation of redshift and time is [Formula: see text]. We transform all the parameters in terms of redshift by using this equation and examine the behavior of these parameters. Our model represents the accelerated expansion of the universe. The energy conditions are examined in terms of redshift and strong energy conditions are not satisfied for the model. We also find the statefinder parameters [Formula: see text] in terms of z and discuss the nature of r–s and r–q plane. For both pairs [Formula: see text] and [Formula: see text] our model represents the [Formula: see text]CDM model. Hence, we determine that our [Formula: see text] model is stable and it satisfies all the observational values.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48712904","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: 1
Non-Linear Sigma Models in Inflationary Cosmology 膨胀宇宙学中的非线性Sigma模型
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-20 DOI: 10.1142/s0218271823420087
A. Goswami
{"title":"Non-Linear Sigma Models in Inflationary Cosmology","authors":"A. Goswami","doi":"10.1142/s0218271823420087","DOIUrl":"https://doi.org/10.1142/s0218271823420087","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42171618","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
Cosmological application of the Maxwell gravity 麦克斯韦引力的宇宙学应用
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-20 DOI: 10.1142/s0218271823500694
S. Kibaroğlu
{"title":"Cosmological application of the Maxwell gravity","authors":"S. Kibaroğlu","doi":"10.1142/s0218271823500694","DOIUrl":"https://doi.org/10.1142/s0218271823500694","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"63903099","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: 1
Born Reciprocity and Discritized Finsler Structure: An Approach to Quantize GR Curvature Tensors on 3-Sphere Born互易和微分Finsler结构:一种量化3球上GR曲率张量的方法
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-20 DOI: 10.1142/s0218271823500682
Abdel Nasser Tawfik, Tahia F. Dabash
{"title":"Born Reciprocity and Discritized Finsler Structure: An Approach to Quantize GR Curvature Tensors on 3-Sphere","authors":"Abdel Nasser Tawfik, Tahia F. Dabash","doi":"10.1142/s0218271823500682","DOIUrl":"https://doi.org/10.1142/s0218271823500682","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44395825","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
Punctuated Chaos and Indeterminism in Self-gravitating Many-body Systems 自引力多体系统中的间断混沌和非决定论
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-13 DOI: 10.1142/s0218271823420038
T. Boekholt, S. P. Portegies Zwart, D. Heggie
{"title":"Punctuated Chaos and Indeterminism in Self-gravitating Many-body Systems","authors":"T. Boekholt, S. P. Portegies Zwart, D. Heggie","doi":"10.1142/s0218271823420038","DOIUrl":"https://doi.org/10.1142/s0218271823420038","url":null,"abstract":"Dynamical chaos is a fundamental manifestation of gravity in astrophysical, many-body systems. The spectrum of Lyapunov exponents quantifies the associated exponential response to small perturbations. Analytical derivations of these exponents are critical for understanding the stability and predictability of observed systems. This essay presents a new model for chaos in systems with eccentric and crossing orbits. Here, exponential divergence is not a continuous process but rather the cumulative effect of an ever-increasing linear response driven by discrete events at regular intervals, i.e., punctuated chaos. We show that long-lived systems with punctuated chaos can magnify Planck length perturbations to astronomical scales within their lifetime, rendering them fundamentally indeterministic.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44788641","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
A New Class of Generalised Ellis-Bronnikov Wormhole in Asymptotically Safe Gravity 渐近安全引力中一类新的广义Ellis-Bronnikov虫洞
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-13 DOI: 10.1142/s0218271823500670
Nisha Godani, Shubham Kala
{"title":"A New Class of Generalised Ellis-Bronnikov Wormhole in Asymptotically Safe Gravity","authors":"Nisha Godani, Shubham Kala","doi":"10.1142/s0218271823500670","DOIUrl":"https://doi.org/10.1142/s0218271823500670","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48539802","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
Constraining the bounce realization with holographic background and analytical exploration of the consequences in a modified gravity framework 全息背景对反弹实现的约束以及在修正重力框架中对结果的分析探索
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-09 DOI: 10.1142/s0218271823500669
M. Ghosh, S. Chattopadhyay
{"title":"Constraining the bounce realization with holographic background and analytical exploration of the consequences in a modified gravity framework","authors":"M. Ghosh, S. Chattopadhyay","doi":"10.1142/s0218271823500669","DOIUrl":"https://doi.org/10.1142/s0218271823500669","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46278809","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
Emergence of Quantum Field Theory in Causal Diamonds 因果钻石中量子场论的出现
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-06-09 DOI: 10.1142/s021827182341002x
T. Banks
{"title":"Emergence of Quantum Field Theory in Causal Diamonds","authors":"T. Banks","doi":"10.1142/s021827182341002x","DOIUrl":"https://doi.org/10.1142/s021827182341002x","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41992290","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
Born Reciprocity and Relativistic Generalized Uncertainty Principle in Finsler Structure: Fundamental Tensor in Discretized Curved Spacetime 芬斯勒结构中的生互易和相对论广义不确定性原理:离散弯曲时空中的基本张量
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-05-22 DOI: 10.1142/s0218271823500608
Abdel Nasser Tawfik, Tahia F. Dabash
{"title":"Born Reciprocity and Relativistic Generalized Uncertainty Principle in Finsler Structure: Fundamental Tensor in Discretized Curved Spacetime","authors":"Abdel Nasser Tawfik, Tahia F. Dabash","doi":"10.1142/s0218271823500608","DOIUrl":"https://doi.org/10.1142/s0218271823500608","url":null,"abstract":"","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49032484","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
On Chaplygin models in f(G) gravity f(G)重力下的Chaplygin模型
IF 2.2 4区 物理与天体物理
International Journal of Modern Physics D Pub Date : 2023-05-22 DOI: 10.1142/s021827182350061x
F. Twagirayezu, Abraham Ayirwanda, Albert Munyeshyaka, Solange Mukeshimana, J. Ntahompagaze, Leon Fidele Ruganzu Uwimbabazi
{"title":"On Chaplygin models in f(G) gravity","authors":"F. Twagirayezu, Abraham Ayirwanda, Albert Munyeshyaka, Solange Mukeshimana, J. Ntahompagaze, Leon Fidele Ruganzu Uwimbabazi","doi":"10.1142/s021827182350061x","DOIUrl":"https://doi.org/10.1142/s021827182350061x","url":null,"abstract":"The current work treats cosmological perturbation in a mixture of standard matter, Chaplygin gas as well as Gauss-bonnet fluids using a 1+3 covariant approach in the context of modified $f(G)$ gravity. We define the gradient variables to obtain linear perturbation equations. After scalar and redshift transformations, we consider both an original Chaplygin and generalized Chaplygin gas models under Gauss-bonnet gravity. For pedagogical purposes, the consideration of polynomial $f(G)$ gravity model was used to solve the perturbation equations for short- and long- wavelength modes and investigate the late time evolution. The numerical solutions were obtained. The results show that the energy overdensity perturbations decay with an increase in redshift. The treatment recovers GR results under limiting cases.","PeriodicalId":50307,"journal":{"name":"International Journal of Modern Physics D","volume":null,"pages":null},"PeriodicalIF":2.2,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45702716","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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