Strong backreaction of gauge quanta produced during inflation

IF 5 2区物理与天体物理 Q1 Physics and Astronomy

Physical Review D Pub Date : 2025-05-16 DOI:10.1103/physrevd.111.103525

Jian-Feng He, Kai-Ge Zhang, Chengjie Fu, Zong-Kuan Guo

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Abstract

During inflation, an axion field coupled to a gauge field through a Chern-Simons term can trigger the production of gauge quanta due to a tachyonic instability. The amplification of the gauge field modes exponentially depends on the velocity of the axion field, which in turn slows down the rolling of the axion field when backreaction is taken into account. To illustrate how the strength of the Chern-Simons coupling and the slope of the axion potential influence the particle production, in this paper we consider a toy model in which the axion field is a spectator with a linear potential. In the strong backreaction regime, the energy density of the gauge field quasiperiodically oscillates. The steep slope of the axion potential linearly increases the peak amplitude of the energy density while the strong coupling linearly decreases the peak amplitude. Additionally, we calculate the energy spectrum of gravitational waves.

Published by the American Physical Society

2025

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通货膨胀期间产生的计量量子的强烈反作用力

在膨胀过程中，一个轴子场通过chen - simons项耦合到规范场可以触发由于速子不稳定性的规范量子的产生。规范场模式的指数放大依赖于轴子场的速度，当考虑反作用力时，轴子场的速度反过来减慢了轴子场的滚动。为了说明chen - simons耦合的强度和轴子势的斜率如何影响粒子的产生，本文考虑了一个玩具模型，其中轴子场是一个具有线性势的旁观者。在强反作用状态下，规范场的能量密度呈准周期振荡。轴突电位的陡斜率使能量密度的峰值幅度线性增大，而强耦合使能量密度的峰值幅度线性减小。此外，我们计算了引力波的能谱。2025年由美国物理学会出版

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

Physical Review D 物理-天文与天体物理

CiteScore

9.20

自引率

36.00%

发文量

审稿时长

2 months

期刊介绍： Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics. PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including: Particle physics experiments, Electroweak interactions, Strong interactions, Lattice field theories, lattice QCD, Beyond the standard model physics, Phenomenological aspects of field theory, general methods, Gravity, cosmology, cosmic rays, Astrophysics and astroparticle physics, General relativity, Formal aspects of field theory, field theory in curved space, String theory, quantum gravity, gauge/gravity duality.