Journal article
The Cosmology of a Universe with Spontaneously-Broken Lorentz Symmetry
- Abstract:
- 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 time-like direction. A plethora of different regimes is identified, such as accelerated expansion, loitering, collapse and tracking.
- Publication status:
- Published
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- Publisher copy:
- 10.1103/PhysRevD.75.044014
Authors
- Journal:
- Phys.Rev.D More from this journal
- Volume:
- 75
- Issue:
- 4
- Pages:
- 044014
- Publication date:
- 2006-10-04
- DOI:
- EISSN:
-
1550-2368
- ISSN:
-
1550-7998
- Keywords:
- Pubs id:
-
pubs:207714
- UUID:
-
uuid:06751430-50d1-4e07-8840-e7cee90e3787
- Local pid:
-
pubs:207714
- Source identifiers:
-
207714
- Deposit date:
-
2012-12-19
- ARK identifier:
Terms of use
- Copyright date:
- 2006
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