用于探索\(f\, (R)\)重力中弹跳和循环宇宙学演化的模型无关的紧致动力系统公式

IF 4.2 2区 物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS
Saikat Chakraborty, Charlotte Louw, A. S. Agrawal, Peter K. S. Dunsby
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引用次数: 0

摘要

利用动力学系统方法和宇宙学参数,我们提出了f(R)重力下宇宙学的一个模型无关的动力学系统公式。这个公式是模型独立的,因为人们不需要指定f(R)的一个特定的先验函数形式,而是需要指定一个特定的宇宙演化,它固定了宇宙学。从某种意义上说,我们的方法是绕过重建方法的方法。这是使用非紧凑和紧凑动态变量来显示的。本文的重点是紧化分析,因为我们用弹跳和循环宇宙学的例子证明了这个公式的适用性。特别是,我们的分析以一种独立于模型的方式揭示了在宇宙整体空间平坦且没有物质的情况下实现这样的宇宙论的问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A model-independent compact dynamical system formulation for exploring bounce and cyclic cosmological evolutions in \(f\, (R)\) gravity

Using the dynamical systems approach together with the cosmographic parameters, we present a model-independent dynamical system formulation for cosmology in f(R) gravity. The formulation is model-independent in the sense that one needs to specify not a particular functional form of f(R) a-priori, but rather a particular cosmological evolution, which fixes the cosmography. In a sense, our approach is the way around the reconstruction method. This is shown using both non-compact and compact dynamical variables. The focus in this paper is on the compact analysis since we demonstrate the applicability of this formulation using examples of bouncing and cyclic cosmology. In particular, our analysis reveals, in a model-independent manner, the problem of achieving such cosmologies when the universe is globally spatially flat and devoid of matter.

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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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