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Detecting dark matter oscillations with gravitational waveforms
Philippe Brax, Clare Burrage, Jose A. R. Cembranos +1
We consider the phase shift in the gravitational wave signal induced by fast oscillations of scalar dark matter surrounding binary systems, which could be probed by the future expe…
Constraining the cosmological evolution of scalar-tensor theories with local measurements of the time variation of G
Clare Burrage, Johannes Dombrowski
We determine the conditions for which the constraints from lunar laser ranging on the time evolution of the local gravitational constant can be extrapolated to impose constraints o…
AION: An Atom Interferometer Observatory and Network
L. Badurina, E. Bentine, D. Blas +38
We outline the experimental concept and key scientific capabilities of AION (Atom Interferometer Observatory and Network), a proposed UK-based experimental programme using cold str…
What laboratory experiments can teach us about cosmology: A chameleon example
Clare Burrage
Laboratory experiments can shed light on theories of new physics introduced in order to explain cosmological mysteries, including the nature of dark energy and dark matter. In this…
Symmetron Scalar Fields: Modified Gravity, Dark Matter or Both?
Clare Burrage, Edmund J. Copeland, Christian Käding +1
Scalar fields coupled to gravity through the Ricci scalar have been considered both as dark matter candidates and as a possible modified gravity explanation for galactic dynamics.…
Stellar kinematics from the symmetron fifth force in the Milky Way disk
Ciaran A. J. O'Hare, Clare Burrage
It has been shown that the presence of non-minimally coupled scalar fields giving rise to a fifth force can noticeably alter dynamics on galactic scales. Such a fifth force must be…
The shape dependence of chameleon screening
Clare Burrage, Edmund J. Copeland, Adam Moss +1
Chameleon scalar fields can screen their associated fifth forces from detection by changing their mass with the local density. These models are an archetypal example of a screening…
Tests of Chameleon Gravity
Clare Burrage, Jeremy Sakstein
Theories of modified gravity where light scalars with non-trivial self-interactions and non-minimal couplings to matter-chameleon and symmetron theories-dynamically suppress deviat…
Radial acceleration relation from symmetron fifth forces
Clare Burrage, Edmund J. Copeland, Peter Millington
We show that the radial acceleration relation for rotationally-supported galaxies may be explained, in the absence of cold dark matter, by a non-minimally coupled scalar field, who…
Constraining symmetron fields with atom interferometry
Clare Burrage, Andrew Kuribayashi-Coleman, James Stevenson +1
We apply the new constraints from atom-interferometry searches for screening mechanisms to the symmetron model, finding that these experiments exclude a previously unexplored regio…
A Compendium of Chameleon Constraints
Clare Burrage, Jeremy Sakstein
The chameleon model is a scalar field theory with a screening mechanism that explains how a cosmologically relevant light scalar can avoid the constraints of intra-solar-system sea…
Cosmology and Fundamental Physics with the Euclid Satellite
Luca Amendola, Stephen Appleby, Anastasios Avgoustidis +69
Euclid is a European Space Agency medium class mission selected for launch in 2020 within the Cosmic Vision 2015 2025 program. The main goal of Euclid is to understand the origin o…
A Proposed Experimental Search for Chameleons using Asymmetric Parallel Plates
Clare Burrage, Edmund J. Copeland, James A. Stevenson
Light scalar fields coupled to matter are a common consequence of theories of dark energy and attempts to solve the cosmological constant problem. The chameleon screening mechanism…
Using Atom Interferometry to Detect Dark Energy
Clare Burrage, Edmund J. Copeland
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 sc…
Beyond the growth rate of cosmic structure: Testing modified gravity models with an extra degree of freedom
Clare Burrage, David Parkinson, David Seery
In 'modified' gravity the observed acceleration of the universe is explained by changing the gravitational force law or the number of degrees of freedom in the gravitational sector…
Cosmological Tests of Coupled Galileons
Philippe Brax, Clare Burrage, Anne-Christine Davis +1
We investigate the cosmological properties of Galileon models with positive kinetic terms. We include both conformal and disformal couplings to matter and focus on constraints on t…
Probing Dark Energy with Atom Interferometry
Clare Burrage, Edmund J. Copeland, E. A. Hinds
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 ch…
Constraining Disformally Coupled Scalar Fields
Philippe Brax, Clare Burrage
Light scalar fields can naturally couple disformally to matter fields. Static, non-relativistic sources do not generate a classical field profile for a disformally coupled scalar,…
Chameleons in the Early Universe: Kicks, Rebounds, and Particle Production
Adrienne L. Erickcek, Neil Barnaby, Clare Burrage +1
Chameleon gravity is a scalar-tensor theory that includes a non-minimal coupling between the scalar field and the matter fields and yet mimics general relativity in the Solar Syste…
Cosmological Tests of the Disformal Coupling to Radiation
Philippe Brax, Clare Burrage, Anne-Christine Davis +1
Light scalar fields can naturally couple disformally to Standard Model fields without giving rise to the unacceptably large fifth forces usually associated with light scalars. We s…
Catastrophic Consequences of Kicking the Chameleon
Adrienne L. Erickcek, Neil Barnaby, Clare Burrage +1
The physics of the "dark energy" that drives the current cosmological acceleration remains mysterious, and the dark sector may involve new light dynamical fields. If these light sc…
Cosmology and fundamental physics with the Euclid satellite
Luca Amendola, Stephen Appleby, David Bacon +60
Euclid is a European Space Agency medium class mission selected for launch in 2019 within the Cosmic Vision 2015-2025 programme. The main goal of Euclid is to understand the origin…
Large slow-roll corrections to the bispectrum of noncanonical inflation
Clare Burrage, Raquel H. Ribeiro, David Seery
Nongaussian statistics are a powerful discriminant between inflationary models, particularly those with noncanonical kinetic terms. Focusing on theories where the Lagrangian is an…
Revisiting fifth forces in the Galileon model
Clare Burrage, David Seery
A Galileon field is one which obeys a spacetime generalization of the non-relativistic Galilean invariance. Such a field may possess non-canonical kinetic terms, but ghost-free the…