New simple and accurate approximations for quintessence

• Main Authors: Alho, Artur, Uggla, Claes
• Format: Journal Article
• Language: English
• Published: 19.07.2024
• Subjects: Physics - Cosmology and Nongalactic Astrophysics; Physics - General Relativity and Quantum Cosmology

We derive new simple approximations for quintessence solutions to Einsteins's field equations in spatially homogeneous, isotropic and flat spacetimes. The approximations are typically an order of magnitude more accurate than anything available in the literature, which from an observational pers...