```
Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., and Saffari, R..
```*Cosmology of a universe with spontaneously broken Lorentz symmetry*. United States: N. p., 2007.
Web. doi:10.1103/PHYSREVD.75.044014.

```
Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., & Saffari, R..
```*Cosmology of a universe with spontaneously broken Lorentz symmetry*. United States. doi:10.1103/PHYSREVD.75.044014.

```
Ferreira, P. G., African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945, Gripaios, B. M., Zlosnik, T. G., and Saffari, R.. Thu .
"Cosmology of a universe with spontaneously broken Lorentz symmetry". United States.
doi:10.1103/PHYSREVD.75.044014.
```

```
@article{osti_21011079,
```

title = {Cosmology of a universe with spontaneously broken Lorentz symmetry},

author = {Ferreira, P. G. and African Institute for Mathematical Sciences, 6-8 Melrose Road, Muizenberg 7945 and Gripaios, B. M. and Zlosnik, T. G. and Saffari, R.},

abstractNote = {A self-consistent effective field theory of modified gravity has recently been proposed with spontaneous breaking of local Lorentz invariance. The symmetry is broken by a vector field with the wrong-sign mass term and it has been shown to have additional graviton modes and modified dispersion relations. In this paper we study the evolution of a homogeneous and isotropic universe in the presence of such a vector field with a minimum lying along the timelike direction. A plethora of different regimes is identified, such as accelerated expansion, loitering, collapse, and tracking.},

doi = {10.1103/PHYSREVD.75.044014},

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

number = 4,

volume = 75,

place = {United States},

year = {Thu Feb 15 00:00:00 EST 2007},

month = {Thu Feb 15 00:00:00 EST 2007}

}