2016/01/31 by Jianbo Lu, Guoying Chee · 1 citation
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #De Sitter universe #Lambda-CDM model #Metric expansion of space #Perfect Cosmological Principle #Physical cosmology #Physics #Quintessence #Relativity and Gravitational Theory #Theoretical physics #Universe #astro-ph.CO #gr-qc
paper · pdf · doi:10.1007/jhep05(2016)024
published as JHEP 05 (2016) 024 · 22 pages, 1 figure. Version published in JHEP
openalex publication_date 2016/05/01 · arxiv created 2016/05/04 · arxiv updated 2016/05/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A cosmology of Poincaré gauge theory is developed, where several properties of universe corresponding to the cosmological equations with the pseudoscalar torsion function are investigated. The cosmological constant is found to be the intrinsic torsion and curvature of the vacuum universe and is derived from the theory naturally rather than added artificially, i.e. the dark energy originates from geometry and includes the cosmological constant but differs from it. The cosmological constant puzzle, the coincidence and fine tuning problem are relieved naturally at the same time. By solving the cosmological equations, the analytic cosmological solution is obtained and can be compared with the ΛCDM model. In addition, the expressions of density parameters of the matter and the geometric dark energy are derived, and it is shown that the evolution of state equations for the geometric dark energy agrees with the current observational data. At last, the full equations of linear cosmological perturbations and the solutions are obtained.