Dynamics of warm inflation in Rastall gravity

IF 3 3区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Annals of Physics Pub Date : 2025-09-23 DOI:10.1016/j.aop.2025.170232

Ines G. Salako , Isaac M. Vitohekpon , Ferdinan Mavoa , V.A. Monwanou

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引用次数: 0

Abstract

Within the strong dissipation regime, our study delves into warm inflation set against the backdrop of Rastall gravity. By employing a scalar field in a FLRW universe, we obtained modified field equations. Subsequently, using slow-roll approximations, we deduced the slow-roll parameters and then determined the power spectra for both scalar and tensor perturbations along with their associated spectral indices. We examined both Chaotic and Natural potentials, estimating the scalar spectral index and tensor-to-scalar ratio for scenarios with constant as well as variable dissipation factor

Γ

. Our results indicate that potentials previously dismissed may be revived within the framework of Rastall gravity by appropriately selecting the Rastall parameter

λ_{Ras}

. Furthermore, it is evident that, within the warm inflationary context, both potentials comply with the Planck 2018 constraints at Planckian and sub Planckian energy scales.

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拉斯托引力中的热暴胀动力学

在强耗散状态下，我们的研究深入研究了以拉斯塔尔引力为背景的热暴胀。通过在FLRW宇宙中引入标量场，我们得到了修正的场方程。随后，使用慢滚近似，我们推导了慢滚参数，然后确定了标量和张量摄动的功率谱及其相关的谱指数。我们检查了混沌势和自然势，估计了恒定和可变耗散因子Γ情况下的标量谱指数和张量-标量比。我们的研究结果表明，在Rastall重力框架内，通过适当选择Rastall参数λRas，可以使先前被忽略的势恢复。此外，很明显，在温暖的暴胀背景下，这两种势都符合普朗克2018在普朗克和亚普朗克能量尺度上的约束。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of Physics 物理-物理：综合

CiteScore

5.30

自引率

3.30%

发文量

211

审稿时长

47 days

期刊介绍： Annals of Physics presents original work in all areas of basic theoretic physics research. Ideas are developed and fully explored, and thorough treatment is given to first principles and ultimate applications. Annals of Physics emphasizes clarity and intelligibility in the articles it publishes, thus making them as accessible as possible. Readers familiar with recent developments in the field are provided with sufficient detail and background to follow the arguments and understand their significance. The Editors of the journal cover all fields of theoretical physics. Articles published in the journal are typically longer than 20 pages.