Branes on the Horizon

Davis, Anne-Christine; Rhodes, Christophe; Vernon, Ian R.

doi:10.1088/1126-6708/2001/11/015

Branes on the Horizon

Davis, Anne-Christine; Rhodes, Christophe; Vernon, Ian R.

Authors

Anne-Christine Davis

Christophe Rhodes

Professor Ian Vernon i.r.vernon@durham.ac.uk
Professor

Abstract

Models with extra dimensions are often invoked to resolve cosmological problems. We investigate the possibility of apparent acausality as seen by a brane-based observer resulting from signal propagation through the extra dimensions. Null geodesics are first computed in static and cosmological single-brane models, following which we derive the equations of motion for the inter-brane distance in a two-brane scenario, which we use to examine possible acausality in this more complex setup. Despite observing significant effective acausality in some situations there is no a priori solution to the horizon problem using this mechanism. In the two-brane scenario there can be significant late time violation of gravitational Lorentz invariance, resulting in the gravitational horizon being larger than the particle horizon, leading to potential signals in gravitational wave detectors.

Citation

Davis, A., Rhodes, C., & Vernon, I. R. (2001). Branes on the Horizon. Journal of High Energy Physics, 11, https://doi.org/10.1088/1126-6708/2001/11/015

Journal Article Type	Article
Publication Date	Nov 1, 2001
Deposit Date	Mar 21, 2011
Publicly Available Date	Oct 19, 2017
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Electronic ISSN	1029-8479
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	11
DOI	https://doi.org/10.1088/1126-6708/2001/11/015
Related Public URLs	http://uk.arxiv.org/abs/hep-ph/0107250