论文标题
宇宙学标量场和大爆炸核合成
Cosmological scalar fields and Big-Bang nucleosynthesis
论文作者
论文摘要
暗物质和暗能量的本质构成了宇宙中$ 95 \％的能源的$ 95 \％$，在宇宙学上仍然是一个伟大而尚未解决的问题。冷暗物质可以由以其质量术语为主的超轻标量场制成，其仅在重力上相互作用。引入的宇宙学常数可以解释宇宙扩展的最新加速度，可以很容易地被其潜力主导的标量场所取代。更一般而言，标量场在宇宙学上无处不在：足体，dilaton，模量，典型，模糊的暗物质，深色流体等是一些例子。人们会怀疑所有这些标量字段是否都是独立的。深色流体模型旨在统一具有独特标量字段的典型和模糊的暗物质模型。一步是通过通货膨胀统一深色流体模型。在很早的宇宙中，这种标量场并非受到直接观察的强烈约束，而是对标量场模型的大键核合成设置的约束，从而导致对元素丰度的修改。在这次演讲中，我们将提出一个标量场模型，统一暗物质，暗能量和通胀，并从原始标量场上的大爆炸核合成中研究约束。
The nature of dark matter and of dark energy which constitute more than $95\%$ of the energy in the Universe remains a great and unresolved question in cosmology. Cold dark matter can be made of an ultralight scalar field dominated by its mass term which interacts only gravitationally. The cosmological constant introduced to explain the recent acceleration of the Universe expansion can be easily replaced by a scalar field dominated by its potential. More generally, scalar fields are ubiquitous in cosmology: inflaton, dilatons, moduli, quintessence, fuzzy dark matter, dark fluid, etc. are some examples. One can wonder whether all these scalar fields are independent. The dark fluid model aims at unifying quintessence and fuzzy dark matter models with a unique scalar field. One step futher is to unify the dark fluid model with inflation. In the very early Universe such scalar fields are not strongly constrained by direct observations, but Big-Bang nucleosynthesis set constraints on scalar field models which lead to a modification on the abundance of the elements. In this talk we will present a scalar field model unifying dark matter, dark energy and inflation, and study constraints from Big-Bang nucleosynthesis on primordial scalar fields.
