303 citations · 2.6k across the 55 of their papers we have counts for
36 papers · 1 filter
Decoupling of large-scale, adiabatic inflationary perturbations from enhanced small-scale modes at one-loop
Laura Iacconi, David Mulryne, David Seery
We reconsider back-reaction from large amplitude, short-scale perturbations onto a long wavelength adiabatic mode. In a loop expansion of the long-mode power spectrum, this back-re…
Stochastic instantons and the tail of the inflationary density perturbation
Jaime Calderón-Figueroa, David Seery
In the "stochastic formalism", the statistics of the inflationary density perturbation are obtained from the first passage distribution of a stochastic process. We develop a g…
Primordial black holes in Randall-Sundrum: Cosmological signatures
Itzi Aldecoa-Tamayo, Christian T. Byrnes, David Seery
We reconsider primordial black hole physics in Randall-Sundrum Type-II universes, focusing on constraints from cosmological and astrophysical observables. We pay particular attenti…
Loop corrections in the separate universe picture
Laura Iacconi, David Mulryne, David Seery
In inflationary models that produce a spike of power on short scales, back-reaction of small-scale substructure onto large-scale modes is enhanced. We argue that the separate unive…
Non-Gaussianity in D3-brane inflation
Kareem Marzouk, Alessandro Maraio, David Seery
We update predictions for observables in the "delicate" D3/anti-D3 inflationary model on the conifold. We use a full CMB likelihood calculation to assess goodness-of-fit, which is…
Impact of bias and redshift-space modelling for the halo power spectrum: Testing the effective field theory of large-scale structure
Lucia Fonseca de la Bella, Donough Regan, David Seery +1
We study the impact of different bias and redshift-space models on the halo power spectrum, quantifying their effect by comparing the fit to a subset of realizations taken from the…
Numerical evaluation of inflationary 3-point functions on curved field space
Sean Butchers, David Seery
We extend the public CppTransport code to calculate the statistical properties of fluctuations in multiple-field inflationary models with curved field space. Our implementation acc…
Towards optimal cosmological parameter recovery from compressed bispectrum statistics
Joyce Byun, Alexander Eggemeier, Donough Regan +2
Over the next decade, improvements in cosmological parameter constraints will be driven by surveys of large-scale structure. Its inherent non-linearity suggests that significant in…
The matter power spectrum in redshift space using effective field theory
Lucía Fonseca de la Bella, Donough Regan, David Seery +1
The use of Eulerian 'standard perturbation theory' to describe mass assembly in the early universe has traditionally been limited to modes with k 0.1 h/Mpc at z = 0. At…
CppTransport: a platform to automate calculation of inflationary correlation functions
David Seery
CppTransport is a numerical platform that can automatically generate and solve the evolution equations for the 2- and 3-point correlation functions (in field space and for the curv…
Numerical evaluation of the bispectrum in multiple field inflation
Mafalda Dias, Jonathan Frazer, David J. Mulryne +1
We present a complete framework for numerical calculation of the power spectrum and bispectrum in canonical inflation with an arbitrary number of light or heavy fields. Our method…
Implications of the CMB power asymmetry for the early universe
Christian T. Byrnes, Donough Regan, David Seery +1
Observations of the microwave background fluctuations suggest a scale-dependent amplitude asymmetry of roughly 2.5 sigma significance. Inflationary explanations for this 'anomaly'…
The hemispherical asymmetry from a scale-dependent inflationary bispectrum
Christian T. Byrnes, Donough Regan, David Seery +1
If the primordial bispectrum is sufficiently large then the CMB hemispherical asymmetry may be explained by a large-scale mode of exceptional amplitude which perturbs the zeta two-…
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…
Computing observables in curved multifield models of inflation - A guide (with code) to the transport method
Mafalda Dias, Jonathan Frazer, David Seery
We describe how to apply the transport method to compute inflationary observables in a broad range of multiple-field models. The method is efficient and encompasses scenarios with…
Constraining Galileon Inflation
Donough Regan, Gemma J. Anderson, Matthew Hull +1
In this short paper, we present constraints on the Galileon inflationary model from the CMB bispectrum. We employ a principal-component analysis of the independent degrees of freed…
Optimal bispectrum constraints on single-field models of inflation
Gemma J. Anderson, Donough Regan, David Seery
We use WMAP 9-year bispectrum data to constrain the free parameters of an 'effective field theory' describing fluctuations in single-field inflation. The Lagrangian of the theory c…
Preheating with Non-Minimal Kinetic Terms
Hillary L. Child, John T. Giblin, Raquel H. Ribeiro +1
We present the first 3+1-dimensional numerical simulations of scalar fields with non-minimal kinetic terms. As an example, we examine the existence and stability of preheating in t…
General CMB bispectrum analysis using wavelets and separable modes
Donough Regan, Pia Mukherjee, David Seery
In this paper we combine partial-wave (`modal') methods with a wavelet analysis of the CMB bispectrum. Our implementation exploits the advantages of both approaches to produce robu…
Scale-dependent bias from multiple-field inflation
Mafalda Dias, Raquel H. Ribeiro, David Seery
We provide a formula for the scaling behaviour of the inflationary bispectrum in the 'squeezed' limit where one momentum becomes much smaller than the other two. This determines th…
The inflationary bispectrum with curved field-space
Joseph Elliston, David Seery, Reza Tavakol
We compute the covariant three-point function near horizon-crossing for a system of slowly-rolling scalar fields during an inflationary epoch, allowing for an arbitrary field-space…
Transport equations for the inflationary trispectrum
Gemma J. Anderson, David J. Mulryne, David Seery
We use transport techniques to calculate the trispectrum produced in multiple-field inflationary models with canonical kinetic terms. Our method allows the time evolution of the lo…
Inflationary perturbation theory is geometrical optics in phase space
David Seery, David J. Mulryne, Jonathan Frazer +1
A pressing problem in comparing inflationary models with observation is the accurate calculation of correlation functions. One approach is to evolve them using ordinary differentia…
Transport equations for the inflationary spectral index
Mafalda Dias, David Seery
We present a simple and efficient method to compute the superhorizon evolution of the spectral index in multi-field inflationary models, using transport equation techniques. We ill…