# Non-Abelian Einstein-Born-Infeld-dilaton cosmology

## Abstract

The non-Abelian Einstein-Born-Infeld-dilaton theory, which rules the dynamics of tensor-scalar gravitation coupled to a su(2)-valued gauge field ruled by Born-Infeld Lagrangian, is studied in a cosmological framework. The microscopic energy exchange between the gauge field and the dilaton which results from a nonuniversality of the coupling to gravity modifies the usual behavior of tensor-scalar theories coupled to matter fluids. General cosmological evolutions are derived for different couplings to gravitation and a comparison to universal coupling is highlighted. Evidences of cosmic acceleration are presented when the evolution is interpreted in the Jordan physical frame of a matter respecting the weak equivalence principle. The importance for the mechanism of cosmic acceleration of the dynamics of the Born-Infeld gauge field, the attraction role of the matter fluid, and the nonuniversality of the gravitational couplings are briefly outlined.

- Authors:

- Laboratory Universe and Theories, Observatoire de Paris-Meudon and Universite Paris 7, CNRS UMR 8102, Meudon (France)

- Publication Date:

- OSTI Identifier:
- 20795712

- Resource Type:
- Journal Article

- Resource Relation:
- Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevD.73.023520; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)

- Country of Publication:
- United States

- Language:
- English

- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCELERATION; BORN-INFELD THEORY; COMPARATIVE EVALUATIONS; COSMOLOGY; COUPLING; ENERGY TRANSFER; EQUIVALENCE PRINCIPLE; GAUGE INVARIANCE; GRAVITATION; LAGRANGIAN FUNCTION; QUANTUM GRAVITY; SCALARS; SU-2 GROUPS; TENSORS

### Citation Formats

```
Fuezfa, A., and Alimi, J.-M.
```*Non-Abelian Einstein-Born-Infeld-dilaton cosmology*. United States: N. p., 2006.
Web. doi:10.1103/PHYSREVD.73.0.

```
Fuezfa, A., & Alimi, J.-M.
```*Non-Abelian Einstein-Born-Infeld-dilaton cosmology*. United States. doi:10.1103/PHYSREVD.73.0.

```
Fuezfa, A., and Alimi, J.-M. Sun .
"Non-Abelian Einstein-Born-Infeld-dilaton cosmology". United States.
doi:10.1103/PHYSREVD.73.0.
```

```
@article{osti_20795712,
```

title = {Non-Abelian Einstein-Born-Infeld-dilaton cosmology},

author = {Fuezfa, A. and Alimi, J.-M.},

abstractNote = {The non-Abelian Einstein-Born-Infeld-dilaton theory, which rules the dynamics of tensor-scalar gravitation coupled to a su(2)-valued gauge field ruled by Born-Infeld Lagrangian, is studied in a cosmological framework. The microscopic energy exchange between the gauge field and the dilaton which results from a nonuniversality of the coupling to gravity modifies the usual behavior of tensor-scalar theories coupled to matter fluids. General cosmological evolutions are derived for different couplings to gravitation and a comparison to universal coupling is highlighted. Evidences of cosmic acceleration are presented when the evolution is interpreted in the Jordan physical frame of a matter respecting the weak equivalence principle. The importance for the mechanism of cosmic acceleration of the dynamics of the Born-Infeld gauge field, the attraction role of the matter fluid, and the nonuniversality of the gravitational couplings are briefly outlined.},

doi = {10.1103/PHYSREVD.73.0},

journal = {Physical Review. D, Particles Fields},

number = 2,

volume = 73,

place = {United States},

year = {Sun Jan 15 00:00:00 EST 2006},

month = {Sun Jan 15 00:00:00 EST 2006}

}