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arXiv 2201.12213astro-ph.COgr-qchep-th
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暴胀和精粹之间的量子引力联系

The quantum gravity connection between inflation and quintessence

C. Wetterich

摘要:

暴胀和精粹都可以用一个标量场来描述。这个宇宙子场的宇宙时间演化实现了从无限过去的紫外不动点区域到无限未来的红外不动点区域的跨越。这相当于从早期的暴胀到晚期的动力学暗能量的过渡,中间辐射和物质占主导地位。量子引力中重整化流的标度解将这两个不动点连接起来。它提供了交叉宇宙学所需的标量势的本质特征,并动态地解决了宇宙学常数问题。红外固定点的量子尺度对称性保护了宇宙子的微小质量,并抑制了宇宙子与原子的耦合,而不需要非线性屏蔽机制,从而解释了微调的明显问题。对于给定的粒子含量,量子引力的标度解是暴胀和动力学暗能量性质的预测框架。

英文摘要:

Inflation and quintessence can both be described by a single scalar field. The cosmic time evolution of this cosmon field realizes a crossover from the region of an ultraviolet fixed point in the infinite past to an infrared fixed point in the infinite future. This amounts to a transition from early inflation to late dynamical dark energy, with intermediate radiation and matter domination. The scaling solution of the renormalization flow in quantum gravity connects the two fixed points. It provides for the essential characteristics of the scalar potential needed for the crossover cosmology and solves the cosmological constant problem dynamically. The quantum scale symmetry at the infrared fixed point protects the tiny mass of the cosmon and suppresses the cosmon coupling to atoms without the need of a non-linear screening mechanism, thereby explaining apparent issues of fine tuning. For a given content of particles the scaling solution of quantum gravity is a predictive framework for the properties of inflation and dynamical dark energy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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