513 citations · 6.8k across the 165 of their papers we have counts for
34 papers · 1 filter
Orbital Precession and Hidden Symmetries in Scalar-Tensor Theories
Anne-Christine Davis, Scott Melville
We revisit the connection between relativistic orbital precession, the Laplace-Runge-Lenz symmetry, and the -channel discontinuity of scattering amplitudes. Applying this to sca…
The hand-made tail: Non-perturbative tails from multifield inflation
Ana Achucarro, Sebastian Cespedes, Anne-Christine Davis +1
It is becoming increasingly clear that large but rare fluctuations of the primordial curvature field, controlled by the tail of its probability distribution, could have dramatic ef…
On the time evolution of cosmological correlators
Sebastian Cespedes, Anne-Christine Davis, Scott Melville
Developing our understanding of how correlations evolve during inflation is crucial if we are to extract information about the early Universe from our late-time observables. To tha…
The Swampland and Screened Modified Gravity
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis
We consider the implications of the swampland conjectures on scalar-tensor theories defined in the Einstein frame in which the scalar interaction is screened. We show that chameleo…
Effective field theory for black holes with induced scalar charges
Leong Khim Wong, Anne-Christine Davis, Ruth Gregory
While no-hair theorems forbid isolated black holes from possessing permanent moments beyond their mass, electric charge, and angular momentum, research over the past two decades ha…
Constraints on holographic multi-field inflation and models based on the Hamilton-Jacobi formalism
Ana Achucarro, Sebastian Cespedes, Anne-Christine Davis +1
In holographic inflation, the cosmological dynamics is postulated to be dual to the renormalization group flow of a Euclidean conformal field theory with marginally relev…
SUPER-Screening
Philippe Brax, Anne-Christine Davis, Jeremy Sakstein
We present a framework for embedding scalar-tensor models of screened modifed gravity such as chameleons, symmetrons and environmental dilatons into global supersymmetry. This achi…
Screening fifth forces in k-essence and DBI models
Philippe Brax, Clare Burrage, Anne-Christine Davis
New fifth forces have not yet been detected in the laboratory or in the solar system, hence it is typically difficult to introduce new light scalar fields that would mediate such f…
Shining Light on Modifications of Gravity
Philippe Brax, Clare Burrage, Anne-Christine Davis
Many modifications of gravity introduce new scalar degrees of freedom, and in such theories matter fields typically couple to an effective metric that depends on both the true metr…
Decoupling Survives Inflation: A Critical Look at Effective Field Theory Violations During Inflation
Anastasios Avgoustidis, Sera Cremonini, Anne-Christine Davis +3
We investigate the validity of effective field theory methods and the decoupling of heavy fields during inflation. Considering models of inflation in which the inflaton is coupled…
Anomalous coupling of scalars to gauge fields
Philippe Brax, Clare Burrage, Anne-Christine Davis +2
We study the transformation properties of a scalar-tensor theory, coupled to fermions, under the Weyl rescaling associated with a transition from the Jordan to the Einstein frame.…
Enhanced (p)reheating in DBI Inflation
A. C. Davis, Raquel H. Ribeiro
We study preheating in DBI hybrid inflation. Preheating occurs since the matter fields are non-minimally coupled to the inflaton. Despite the coupling being small, preheating happe…
Decoupling Dark Energy from Matter
Philippe Brax, Carsten van de Bruck, Jerome Martin +1
We examine the embedding of dark energy in high energy models based upon supergravity and extend the usual phenomenological setting comprising an observable sector and a hidden sup…
Cusps on cosmic superstrings with junctions
Anne-Christine Davis, William Nelson, Senthooran Rajamanoharan +1
The existence of cusps on non-periodic strings ending on D-branes is demonstrated and the conditions, for which such cusps are generic, are derived. The dynamics of F-, D-string an…
Bogomol'nyi Bounds for Gravitational Cosmic Strings
Anne-Christine Davis, Senthooran Rajamanoharan
We present a new method for finding lower bounds on the energy of topological cosmic string solutions in gravitational field theories. This new method produces bounds that are vali…
Staggered Multi-Field Inflation
Diana Battefeld, Thorsten Battefeld, Anne-Christine Davis
We investigate multi-field inflationary scenarios with fields that drop out of the model in a staggered fashion. This feature is natural in certain multi-field inflationary setups…
Racetrack Inflation and Cosmic Strings
Philippe Brax, Carsten van de Bruck, Anne-Christine Davis +3
We consider the coupling of racetrack inflation to matter fields as realised in the D3/D7 brane system. In particular, we investigate the possibility of cosmic string formation in…
Brane Inflation and Defect Formation
A. C. Davis, P. Brax, C. van de Bruck
Brane inflation and the production of topological defects at the end of the inflationary phase are discussed. After a description of the inflationary setup we discuss the propertie…
A Study of Structure Formation and Reheating in the D3/D7 Brane Inflation Model
Robert H. Brandenberger, Keshav Dasgupta, Anne-Christine Davis
We study the spectrum of cosmological fluctuations in the D3/D7 brane inflationary universe with particular attention to the parametric excitation of entropy modes during the rehea…
P-term Potentials from 4-D Supergravity
C. Burrage, A. C. Davis
P-term inflation arises in some models of brane inflation. Within N=2 supersymmetry the scalar potential contains a vector of Fayet-Iliopoulos (FI) terms . Depending on the di…
Coupling Hybrid Inflation to Moduli
Ph. Brax, C. van de Bruck, A. C. Davis +1
Hybrid inflation can be realised in low-energy effective string theory, as described using supergravity. We find that the coupling of moduli to F-term hybrid inflation in supergrav…
Fermionic Zero Modes of Supergravity Cosmic Strings
Ph. Brax, C. van de Bruck, A. C. Davis +1
Recent developments in string theory suggest that cosmic strings could be formed at the end of brane inflation. Supergravity provides a realistic model to study the properties of s…
Fundamental cosmic strings
A. -C. Davis, T. W. B. Kibble
Cosmic strings are linear concentrations of energy that may be formed at phase transitions in the very early universe. At one time they were thought to provide a possible origin fo…
Local Axion Cosmic Strings from Superstrings
Stephen C. Davis, Pierre Binetruy, Anne-Christine Davis
Axionic cosmic string solutions are investigated in a superstring motivated model with a pseudo-anomalous U(1) gauge symmetry. The inclusion of a gauge field and spatially varying…