Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Are f(R) dark energy models cosmologically viable?

Luca Amendola1, David Polarski, Shinji Tsujikawa

  • 1INAF/Oss. Astronomico di Roma, Via Frascati 33, 00040 Monte Porzio Catone, Rome, Italy.

Physical Review Letters
|May 16, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Effect-based methods and effect-based trigger values for estrogenicity monitoring in surface water: an interlaboratory study.

Environmental research·2026
Same author

Cosmological Spatial Curvature with the Alcock-Paczyński Effect.

Physical review letters·2025
Same author

Instability of Nonsingular Black Holes in Nonlinear Electrodynamics.

Physical review letters·2025
Same author

Breath Analysis via Gas Chromatography-Mass Spectrometry (GC-MS) in Chronic Coronary Syndrome (CCS): A Proof-of-Concept Study.

Journal of clinical medicine·2024
Same author

Summary recommendations on "Analytical methods for substances in the Watch List under the Water Framework Directive".

The Science of the total environment·2023
Same author

Modular dual mobility articulation in primary and revision hip arthroplasty: lights and shadows.

Journal of orthopaedic surgery and research·2023
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Modified gravity theories (f(R) gravity) are inconsistent with cosmological observations. Their predicted scale factor evolution during the matter phase deviates from standard cosmology, ruling out most proposed models despite passing other tests.

Area of Science:

  • Cosmology
  • Modified Gravity Theories
  • Dark Energy Models

Background:

  • f(R) modified gravity theories are conformally equivalent to quintessence models with strong matter-dark energy coupling.
  • This coupling leads to cosmological evolution distinct from the standard cosmological model.

Purpose of the Study:

  • To investigate the cosmological implications of f(R) modified gravity theories.
  • To assess the consistency of these theories with observational data.

Main Methods:

  • Conformal transformation of f(R) theories to equivalent quintessence models.
  • Analysis of the scale factor evolution during the matter-dominated era.
  • Comparison of theoretical predictions with cosmological observations, including the Wilkinson Microwave Anisotropy Probe (WMAP).

Related Experiment Videos

Main Results:

  • In f(R) theories where a power of R dominates, the scale factor grows as t^(1/2) during the matter phase.
  • This growth rate is significantly different from the standard cosmological model's t^(2/3).
  • The derived scale factor evolution is inconsistent with observational data from WMAP.

Conclusions:

  • Most proposed f(R) gravity models are ruled out by their incompatibility with cosmological observations.
  • Even models that satisfy supernovae tests and local gravity constraints are excluded.
  • The strong coupling between matter and dark energy in these theories leads to a fundamentally different cosmological evolution.