2.5k citations · 8.6k across the 62 of their papers we have counts for
6 papers · 1 filter
Conditions for the cosmological viability of f(R) dark energy models
Luca Amendola, Radouane Gannouji, David Polarski +1
We derive the conditions under which dark energy models whose Lagrangian densities f are written in terms of the Ricci scalar R are cosmologically viable. We show that the cosmolog…
Pointer states for primordial fluctuations in inflationary cosmology
C. Kiefer, I. Lohmar, D. Polarski +1
Primordial fluctuations in inflationary cosmology acquire classical properties through decoherence when their wavelengths become larger than the Hubble scale. Although decoherence…
Scalar-Tensor Models of Normal and Phantom Dark Energy
Radouane Gannouji, David Polarski, Andre Ranquet +1
We consider the viability of dark energy (DE) models in the framework of the scalar-tensor theory of gravity, including the possibility to have a phantom DE at small redshifts …
Dark Energy: Beyond General Relativity?
David Polarski
6 pages; Subm. to AIP Conf. Proceedings
Power-laws f(R) theories are cosmologically unacceptable
Luca Amendola, David Polarski, Shinji Tsujikawa
In a recent paper [1] (PRL 98,131302,2007) we have shown that f(R)=R + mu R^{n} modified gravity dark energy models are not cosmologically viable because during the matter era that…
Are f(R) dark energy models cosmologically viable ?
Luca Amendola, David Polarski, Shinji Tsujikawa
All modified gravity theories are conformally identical to models of quintessence in which matter is coupled to dark energy with a strong coupling. This coupling induces a c…