Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity
By S. Jhingan, Shin'ichi Nojiri, Sergei D. Odintsov, M. Sami, I. Thongkool, Sergio Zerbini. 2008
144 citations recorded by the source corpus.
Abstract In this Letter we have investigated the cosmological dynamics of non-locally corrected gravity involving a function of the inverse d'Alembertian of the Ricci scalar, f ( □ −1 R ) . Casting the dynamical equations into local form, we derive the fixed points of the dynamics and demonstrate the existence and stability of a one parameter family of dark energy solutions for a simple choice, f ( □ −1 R ) ∼ exp ( α □ −1 R ) . The effective EoS parameter is given by, w eff = ( α − 1 ) / ( 3 α − 1 ) and the stability of the solutions is guaranteed provided that 1 / 3 α 2 / 3 . For 1 / 3 α 1 / 2 and 1 / 2 α 2 / 3 , the underlying system exhibits phantom and non-phantom behavior respectively; the de Sitter solution corresponds to α = 1 / 2 . For a wide range of initial conditions, the system mimics dust like behavior before reaching the stable fixed point. The late time phantom phase is achieved without involving negative kinetic energy fields. A brief discussion on the entropy of de Sitter space in non-local model is included.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/73837ed936aac2b88091905a8b00e1494f6add28
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
- T. Sotiriou
- Valerio Faraoni
- S. Tsujikawa
- Francisco S. N. Lobo
- Antonio de Felice
- Tiberiu Harko
- Salvatore Capozziello
- Sergei D. Odintsov
In Nuclear and High Energy Physics
- T. Sotiriou
- Valerio Faraoni
- S. Tsujikawa
- Antonio de Felice
- Kurt Hinterbichler
- Salvatore Capozziello
- Francisco S. N. Lobo
- Tiberiu Harko
Citations in the corpus
- New physics in light of the H0 tension: An alternative view (2019, unknown): “[280–293].”
- f(R) Theories Of Gravity (2008, methodology): “…and cluster scales, using metric f(R) gravity as a substitute for dark matter (Capozziello et al., 2004, 2005a, 2006a, 2007a, 2006b, 2007f; Iorio and Ruggiero, 2007a,b; Jhingan et al., 2008; Martins and Salucci, 2007; Nojiri and Odintsov, 2008a; Saffari and Sobouti, 2007; Zhao and Li, 2008).”