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Publications Influence

From k-essence to generalised Galileons

- C. Deffayet, Xian Gao, D. Steer, G. Zahariade
- Physics
- 16 March 2011

We determine the most general scalar field theories which have an action that depends on derivatives of order two or less, and have equations of motion that stay second order and lower on flat… Expand

684 21- PDF

Accelerated universe from gravity leaking to extra dimensions

- C. Deffayet, G. Dvali, G. Gabadadze
- Physics
- 4 May 2001

We discuss the idea that the accelerated universe could be the result of gravitational leakage into extra dimensions over Hubble distances rather than the consequence of a nonzero cosmological… Expand

819 10- PDF

Supernovae, CMB, and gravitational leakage into extra dimensions

- C. Deffayet, S. Landau, J. Raux, M. Zaldarriaga, P. Astier
- Physics
- 10 January 2002

We discuss observational constraints coming from CMB and type Ia supernovae for the model of an accelerated universe produced by gravitational leakage into extra dimensions. Our fits indicate that… Expand

147 5- PDF

On horizon structure of bimetric spacetimes

- C. Deffayet, T. Jacobson
- Physics
- 25 July 2011

We discuss the structure of horizons in spacetimes with two metrics, with applications to the Vainshtein mechanism and other examples. We show, without using the field equations, that if the two… Expand

48 5- PDF

Reconstructing the Distortion Function for Nonlocal Cosmology

- C. Deffayet, R. Woodard
- Physics
- 6 April 2009

We consider the cosmology of modified gravity models in which Newton's constant is distorted by a function of the inverse d'Alembertian acting on the Ricci scalar. We derive a technique for choosing… Expand

100 4- PDF

The radion in brane cosmology

- P. Bin'etruy, C. Deffayet, D. Langlois
- Physics
- 31 January 2001

Abstract We consider the homogeneous cosmological radion, which we define as the interbrane distance in a two-brane and Z 2 symmetrical configuration. In a coordinate system where one of the brane is… Expand

51 3- PDF

Dimming of supernovae by photon-pseudoscalar conversion and the intergalactic plasma

- C. Deffayet, D. Harari, J. Uzan, M. Zaldarriaga
- Physics
- 7 December 2001

It has been suggested recently that the observed dimming of distant type Ia supernovae may be a consequence of mixing of the photons with very light axions. We point out that the effect of the… Expand

38 1- PDF

Classifying Galileon $p$-form theories

- C. Deffayet, S. Garcia-Saenz, S. Mukohyama, Vishagan Sivanesan
- Physics
- 10 April 2017

We provide a complete classification of all abelian gauge invariant $p$-form theories with equations of motion depending only on the second derivative of the field---the $p$-form analogues of the… Expand

12 1- PDF

On brane world cosmological perturbations

- C. Deffayet
- Physics
- 9 May 2002

We discuss the scalar cosmological perturbations in a 3-brane world with a 5D bulk. We first show explicitly how the effective perturbed Einstein equations on the brane (involving the Weyl fluid) are… Expand

66- PDF

Multigravity from a discrete extra dimension

- C. Deffayet, J. Mourad
- Physics
- 14 November 2003

Multigravity theories are constructed from the discretization of the extra dimension of five-dimensional gravity. Using an ADM decomposition, the discretization is performed while maintaining the… Expand

34- PDF

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