Confronting quantum-corrected teleparallel cosmology with observations. Issue 4 (1st April 2022)

• Record Type: Journal Article
• Authors: Bernardo, Reginald Christian; Chen, Che-Yu; Levi Said, Jackson; Kung, Yu-Hsien
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2022:Issue 4(2022)
• Publication Date: 2022-04-01
• Subjects: modified gravity -- dark energy theory -- quantum cosmology; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2022/04/052
• Languages: English
• ISSNs: 1475-7516

Abstract

Abstract: It has been shown that at the semi-classical order, gravitational theories with quantum fluctuations can be effectively recast as modified theories of gravity with non-minimal gravity-matter couplings. We proceed from an observational perspective and see whether such quantum fluctuations can leave imprints on the late Universe. Within the teleparallel formulation, we investigate a representative model in this general class of modified gravitational theories inlaid with quantum fluctuations, and determine the cosmological parameters by using compiled late-time data sets. Furthermore, we assess the statistical significance of such quantum corrections compared to the standard cosmological model. The results mildly favor the inclusion of quantum corrections with a negative density parameter supporting a phantom-like dark energy. This edge is not sufficient to rule out either models but it supports the consideration of quantum corrections in a cosmological setting.