振荡子的结构:吸引自相互作用的动力学
The Structure of the Oscillon: The Dynamics of Attractive Self-Interaction
摘要:
具有吸引自相互作用的实标量场可以形成自束缚态,称为光子。这些致密的天体在暗物质和暴胀的主流理论中无处不在;特别令人感兴趣的是在$14$ Gyr之后存活下来的长寿命光子,它们提供了戏剧性的天体物理特征。我们介绍了一种新的形式主义计算的性质,提高了精度,我们适用于研究的内部结构的光子,并确定负责的光子寿命的物理机制。特别是,我们展示了如何施加现实的边界条件自然选择一个近最低限度的辐射解决方案,以及如何从其几何形状的寄生虫寿命。此外,我们引入了一个自然的词汇表的问题,我们用它来预测新的功能,在介子的演变。这个框架允许新的高效算法,我们用它来解决问题,是否以及在何种程度上长寿的pronuncions微调。最后,我们构建了一个家庭的潜力,支持超长寿命的pronons,在超过$10^{17}$年的寿命。
英文摘要:
Real scalar fields with attractive self-interaction may form self-bound states, called oscillons. These dense objects are ubiquitous in leading theories of dark matter and inflation; of particular interest are long-lived oscillons which survive past $14$ Gyr, offering dramatic astrophysical signatures into the present day. We introduce a new formalism for computing the properties of oscillons with improved accuracy, which we apply to study the internal structure of oscillons and to identify the physical mechanisms responsible for oscillon longevity. In particular, we show how imposing realistic boundary conditions naturally selects a near-minimally radiating solution, and how oscillon longevity arises from its geometry. Further, we introduce a natural vocabulary for the issue of oscillon stability, which we use to predict new features in oscillon evolution. This framework allows for new efficient algorithms, which we use to address questions of whether and to what extent long-lived oscillons are fine-tuned. Finally, we construct a family of potentials supporting ultra-long-lived oscillons, with lifetimes in excess of $10^{17}$ years.
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