远距平行引力中标量场势的动力系统分析

IF 4.2 2区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2024-10-21 DOI:10.1140/epjc/s10052-024-13461-7
S. A. Kadam, Ananya Sahu, S. K. Tripathy, B. Mishra
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引用次数: 0

摘要

本文提出了一个幂律宇宙学模型及其在 \(f(T,\phi )\) 引力下的动力学系统分析,其中 T 是扭转标量,\(\phi \) 是典型标量场。研究了非最小耦合函数 \(F(\phi)\)的指数形式和幂律形式(指数标量场势)。通过建立无量纲动力学变量进行了动力学系统分析,并得到了临界点。分析了每种情况下标准密度参数的演变。状态方程(EoS)和减速参数的行为与最近的宇宙学观测结果一致。利用临界点的存在和稳定条件对模型参数进行了约束,临界点描述了宇宙演化的不同时代。
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Dynamical system analysis for scalar field potential in teleparallel gravity

In this paper, we have presented a power law cosmological model and its dynamical system analysis in \(f(T,\phi )\) gravity, where T is the torsion scalar and \(\phi \) is the canonical scalar field. The two well-motivated forms of the non-minimal coupling function \(F(\phi )\), the exponential form and the power law form, with exponential scalar field potential, are investigated. The dynamical system analysis is performed by establishing the dimensionless dynamical variables, and the critical points were obtained. The evolution of standard density parameters is analysed for each case. The behaviour of the equation of state (EoS) and deceleration parameter agree with the result of recent cosmological observations. The model parameters are constrained using the existence and the stability conditions of the critical points describing different epochs of the evolution of the Universe.

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来源期刊
The European Physical Journal C
The European Physical Journal C 物理-物理:粒子与场物理
CiteScore
8.10
自引率
15.90%
发文量
1008
审稿时长
2-4 weeks
期刊介绍: Experimental Physics I: Accelerator Based High-Energy Physics Hadron and lepton collider physics Lepton-nucleon scattering High-energy nuclear reactions Standard model precision tests Search for new physics beyond the standard model Heavy flavour physics Neutrino properties Particle detector developments Computational methods and analysis tools Experimental Physics II: Astroparticle Physics Dark matter searches High-energy cosmic rays Double beta decay Long baseline neutrino experiments Neutrino astronomy Axions and other weakly interacting light particles Gravitational waves and observational cosmology Particle detector developments Computational methods and analysis tools Theoretical Physics I: Phenomenology of the Standard Model and Beyond Electroweak interactions Quantum chromo dynamics Heavy quark physics and quark flavour mixing Neutrino physics Phenomenology of astro- and cosmoparticle physics Meson spectroscopy and non-perturbative QCD Low-energy effective field theories Lattice field theory High temperature QCD and heavy ion physics Phenomenology of supersymmetric extensions of the SM Phenomenology of non-supersymmetric extensions of the SM Model building and alternative models of electroweak symmetry breaking Flavour physics beyond the SM Computational algorithms and tools...etc.
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