Reconstruction of ΛCDM expansion in nonlocal gravity

Roobiat, K. Y.; Pazhouhesh, R.

doi:10.1142/s0218271817501346

Cited by 2 publications

(1 citation statement)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reconstruction has been applied in an extended number of works, including f 594,976], non-local [672,367,416,1035,921], higher-order curvature contributions [980], and unimodular theories [595,891]. Further information on unimodular and mimetic reconstruction is available in Ref.…”

Section: Reconstruction Methodsmentioning

confidence: 99%

Teleparallel Gravity: From Theory to Cosmology

Bahamonde¹,

Dialektopoulos²,

Escamilla-Rivera³

et al. 2021

Preprint

123

259

View full text Add to dashboard Cite

Equation of State LHS Left hand side RHS Right hand side STEGR Symmetric teleparallel equivalent of general relativity TEGB Teleparallel equivalent of the Gauss-Bonnet PPN Parameterized post-Newtonian formalism SN Supernova (we use abbreviations SNeIa and SNIa to refer to supernova type 1a) BAO Baryonic Acoustic Oscillations CC Cosmic Chronometers DE Dark energy HDE Holographic Dark Energy QCD Quantum Chromodynamics PlDE Pilgrim Dark Energy CMB Cosmic Microwave Background WMAP Wilkinson Microwave Anisotropy Probe SVT Scalar-Vector-Tensor VLBI Very Long Baseline Interferometry SH0ES Supernova H0 for the Equation of State TRGB Tip of the red-giant branch TDCOSMO Time-delay Cosmography vi

show abstract

Section: Reconstruction Methodsmentioning

confidence: 99%

Teleparallel Gravity: From Theory to Cosmology

Bahamonde¹,

Dialektopoulos²,

Escamilla-Rivera³

et al. 2021

Preprint

123

259

View full text Add to dashboard Cite

show abstract

Revival of the Deser-Woodard nonlocal gravity model: Comparison of the original nonlocal form and a localized formulation

Park

2018

Phys. Rev. D

View full text Add to dashboard Cite

We examine the origin of two opposite results for the growth of perturbations in the Deser-Woodard (DW) nonlocal gravity model. One group previously analyzed the model in its original nonlocal form and showed that the growth of structure in the DW model is enhanced compared to general relativity (GR) and thus concluded that the model was ruled out. Recently, however, another group has reanalyzed it by localizing the model and found that the growth in their localized version is suppressed even compared to the one in GR. The question was whether the discrepancy originates from an intrinsic difference between the nonlocal and localized formulations or is due to their different implementations of the sub-horizon limit. We show that the nonlocal and local formulations give the same solutions for the linear perturbations as long as the initial conditions are set the same. The different implementations of the sub-horizon limit lead to different transient behaviors of some perturbation variables; however, they do not affect the growth of matter perturbations at the subhorizon scale much. In the meantime, we also report an error in the numerical calculation code of the former group and verify that after fixing the error the nonlocal version also gives the suppressed growth. Finally, we discuss two alternative definitions of the effective gravitational constant taken by the two groups and some open problems.

show abstract

Reconstruction of ΛCDM expansion in nonlocal gravity

Cited by 2 publications

References 69 publications

Teleparallel Gravity: From Theory to Cosmology

Teleparallel Gravity: From Theory to Cosmology

Revival of the Deser-Woodard nonlocal gravity model: Comparison of the original nonlocal form and a localized formulation

Contact Info

Product

Resources

About