Self-accelerating universe in modified gravity with dynamical torsion

2016/06/30 by V. Nikiforova, Vasilisa Nikiforova, S. Randjbar-Daemi +3 · 2 citations
Mathematics · Physics and Astronomy · #Advanced Differential Geometry Research #Black Holes and Theoretical Physics #Classical mechanics #Connection (principal bundle) #Cosmological constant #Cosmology and Gravitation Theories #Dimensionless quantity #Einstein #Friedmann–Lemaître–Robertson–Walker metric #Geometry #Gravitation #Mathematical physics #Mathematics #Minkowski space #Physics #Quantum mechanics #Theoretical physics #Torsion (gastropod) #Universe #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevd.95.024013

published as Phys. Rev. D 95, 024013 (2017)

arxiv created 2016/12/17 · openalex publication_date 2017/01/11 · arxiv updated 2017/10/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider a model belonging to the class of gravities with dynamical torsion. The model is free of ghosts and gradient instabilities about Minkowski and torsionless Einstein backgrounds. We find that at zero cosmological constant, the model admits a self-accelerating solution with a non-Riemannian connection. Small value of the effective cosmological constant is obtained at the expense of the hierarchy between the dimensionless couplings.

Citations

• More on ghosts in the Dvali-Gabadaze-Porrati model
• General relativity with spin and torsion: Foundations and prospects
• Theoretical Aspects of Massive Gravity
• Searches for the role of spin and polarization in gravity
• Resummation of Massive Gravity
• Cosmology in Poincaré gauge gravity with a pseudoscalar torsion

Cited by

• Spherically symmetric perturbations of a Schwarzschild black hole in torsion bigravity
• Black holes in torsion bigravity