English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We consider a single Minkowski brane sandwiched in between two copies ofanti-de Sitter space. We allow the bulk Planck mass and cosmological constantto differ on either side of the brane. Linearised perturbations about thisbackground reveal that gravity can be modified in the infra-red. Atintermediate scales, the braneworld propagator mimics four-dimensional GR inthat it has the correct momentum dependance. However it has the wrong tensorstructure. Beyond a source dependant scale, we show that quadratic branebending contributions become important, and conspire to correct the tensorstructure of the propagator. We argue that even higher order terms canconsistently be ignored up to very high energies, and suggest that there is noproblem with strong coupling. We also consider scalar and vector perturbationsin the bulk, checking for scalar ghosts.Comment: Version appearing in CQ

Infra-red modification of gravity from asymmetric branes