The quantum gravity connection between inflation and quintessence

• Verfasst von: Wetterich, Christof [VerfasserIn]
• Titel: The quantum gravity connection between inflation and quintessence
• Verf.angabe: C. Wetterich
• E-Jahr: 2022
• Jahr: 28 Jan 2022
• Umfang: 13 S.
• Fussnoten: Gesehen am 26.10.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2022
• Band/Heft Quelle: (2022), Artikel-ID 2201.12213, Seite 1-13
• DOI: doi:10.48550/arXiv.2201.12213
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Astrophysics - Cosmology and Nongalactic Astrophysics
• Sach-SW: General Relativity and Quantum Cosmology
• Sach-SW: High Energy Physics - Theory
• K10plus-PPN: 1804105686

Abstract

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.