2016/07/04 by A. N. Ivanov, Ivanov, A. N., M. Wellenzohn +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #Solar and Space Plasma Dynamics
paper · pdf · doi:10.48550/arxiv.1607.00884
openalex publication_date 2016/07/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In the Einstein-Cartan gravitational theory with the chameleon field, changing its mass in dependence of a density of its environment, we analyze the Friedmann-Einstein equations for the Universe evolution with the expansion parameter a dependent on time only. We analyze the problem of an identification of the chameleon field with quintessence, i.e. a canonical scalar field responsible for dark energy dynamics and for the acceleration of the Universe expansion. We show that since the cosmological constant, related to the relic dark energy density, is induced by torsion (Astrophys. J.829, 47 (2016)), the chameleon field may, in principle, possess some properties of quintessence such as an influence on the dark energy dynamics and the acceleration of the Universe expansion even on the late-time acceleration, but it cannot be identified with quintessence to full extent.