All Outputs (7)

Disformal dark energy at colliders (2015)
Journal Article
Brax, P., Burrage, C., & Englert, C. (2015). Disformal dark energy at colliders. Physical Review D, D92(4), Article 044036. https://doi.org/10.1103/PhysRevD.92.044036

Disformally coupled, light scalar fields arise in many of the theories of dark energy and modified gravity that attempt to explain the accelerated expansion of the Universe. They have proved difficult to constrain with precision tests of gravity beca... Read More about Disformal dark energy at colliders.

Using atom interferometry to detect dark energy (2015)
Journal Article
Burrage, C., & Copeland, E. J. (in press). Using atom interferometry to detect dark energy. Contemporary Physics, 57(2), https://doi.org/10.1080/00107514.2015.1060058

We review the tantalising prospect that the first evidence for the dark energy driving the observed acceleration of the Universe on giga-parsec scales may be found through metre scale laboratory based atom interferometry experiments. To do that, we f... Read More about Using atom interferometry to detect dark energy.

Shape dependence of Vainshtein screening (2015)
Journal Article
Bloomfield, J. K., Burrage, C., & Davis, A. (2015). Shape dependence of Vainshtein screening. Physical Review D, D91(8), Article 083510. https://doi.org/10.1103/PhysRevD.91.083510

Scalar field theories that possess a Vainshtein mechanism are able to dynamically suppress the associated fifth forces in the presence of massive sources through derivative nonlinearities. The resulting equations of motion for the scalar are highly n... Read More about Shape dependence of Vainshtein screening.

Ellipticity weakens chameleon screening (2015)
Journal Article
Burrage, C., Copeland, E. J., & Stevenson, J. (2015). Ellipticity weakens chameleon screening. Physical Review D, D91(6), Article 065030. https://doi.org/10.1103/PhysRevD.91.065030

The chameleon mechanism enables a long-range fifth force to be screened in dense environments when nontrivial self-interactions of the field cause its mass to increase with the local density. To date, chameleon fifth forces have mainly been studied f... Read More about Ellipticity weakens chameleon screening.

Probing dark energy with atom interferometry (2015)
Journal Article
Burrage, C., Copeland, E. J., & Hinds, E. A. (2015). Probing dark energy with atom interferometry. Journal of Cosmology and Astroparticle Physics, 2015(3), Article 042. https://doi.org/10.1088/1475-7516/2015/03/042

© 2015 IOP Publishing Ltd and Sissa Medialab srl. Theories of dark energy require a screening mechanism to explain why the associated scalar fields do not mediate observable long range fifth forces. The archetype of this is the chameleon field. Here... Read More about Probing dark energy with atom interferometry.

Cosmological tests of coupled Galileons (2015)
Journal Article
Brax, P., Burrage, C., Davis, A., & Gubitosi, G. (2015). Cosmological tests of coupled Galileons. Journal of Cosmology and Astroparticle Physics, 15(3), Article 028. https://doi.org/10.1088/1475-7516/2015/03/028

We investigate the cosmological properties of Galileon models which admit Minkowski space as a stable solution in vacuum. This is motivated by stable, positive tension brane world constructions that give rise to Galileons. We include both conformal a... Read More about Cosmological tests of coupled Galileons.

Explaining the proton radius puzzle with disformal scalars (2015)
Journal Article
Brax, P., & Burrage, C. (2015). Explaining the proton radius puzzle with disformal scalars. Physical Review D, D91(4), Article 043515. https://doi.org/10.1103/PhysRevD.91.043515

We analyze the consequences of a disformal interaction between a massless scalar and matter particles in the context of atomic physics. We focus on the displacement of the atomic energy levels that it induces, and in particular the change in the Lamb... Read More about Explaining the proton radius puzzle with disformal scalars.