面向热大爆炸宇宙的参量放大超级辐射

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2024-11-13 DOI:10.1016/j.physletb.2024.139133

Motohiko Yoshimura , Kunio Kaneta , Kin-ya Oda

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引用次数: 0

摘要

我们利用参数放大超辐射的新理念，提出了膨胀后预热阶段的机制。在哈勃体积内，与围绕其势能最小值振荡的场相关的参数共振效应产生了高相干性状态，其特点是标量场的宏观相干性与所产生的无质量粒子成对耦合。这种状态可以用简单的迪克型超辐射模型有效描述，超辐射脉冲是在哈勃时间内发射的，因此可以忽略宇宙膨胀。产生的粒子相互作用改变了它们的能量和动量分布，从而实现了热热大爆炸宇宙。因此，长期存在的宇宙膨胀后的热问题可能会迎刃而解。此外，还提出了一种在热化宇宙出现时产生的新暗物质候选物质。

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Parametrically amplified super-radiance towards hot big bang universe

We propose a mechanism of preheating stage after inflation, using a new idea of parametrically amplified super-radiance. Highly coherent state, characterized by macro-coherence of scalar field coupled to produced massless particle in pairs, is created by parametric resonance effects associated with field oscillation around its potential minimum, within a Hubble volume. The state is described effectively by the simple Dicke-type of super-radiance model, and super-radiant pulse is emitted within a Hubble time, justifying neglect of cosmic expansion. Produced particles are shown to interact to change their energy and momentum distribution to realize thermal hot big bang universe. A long standing problem of heating after inflation may thus be solved. A new dark matter candidate produced at the emergence of thermalized universe is suggested as well.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.