918 citations · 10.5k across the 126 of their papers we have counts for
35 papers · 1 filter
Constraints on Kinetically Modified Inflation from WMAP5
Larissa Lorenz, Jerome Martin, Christophe Ringeval
Single field inflationary models with a non-minimal kinetic term (also called k-inflationary models) can be characterised by the so-called sound flow functions, which complete the…
K-inflationary Power Spectra in the Uniform Approximation
Larissa Lorenz, Jerome Martin, Christophe Ringeval
The advent of explicit Dirac-Born-Infeld (DBI) inflationary models within string theory has drawn renewed interest to the cosmological role of unusual scalar field dynamics, usuall…
Quintessence: a mini-review
Jerome Martin
Models where the accelerated expansion of our Universe is caused by a quintessence scalar field are reviewed. In the framework of high energy physics, the physical nature of this f…
Curvaton Decay into Baryons, anti-Baryons and Radiation
Martin Lemoine, Jerome Martin, Gregory Petit
This paper calculates the amount of baryon/radiation isocurvature fluctuation produced through the decay of a curvaton field. It is shown in particular that if curvaton decay prese…
Generation of Large-Scale Magnetic Fields in Single-Field Inflation
Jerome Martin, Jun'ichi Yokoyama
We consider the generation of large-scale magnetic fields in slow-roll inflation. The inflaton field is described in a supergravity framework where the conformal invariance of the…
Neutralino Dark Matter and the Curvaton
Martin Lemoine, Jerome Martin
We build a realistic model of curvaton cosmology, in which the energy content is described by radiation, WIMP dark matter and a curvaton component. We calculate the curvature and i…
Inflation after WMAP3: Confronting the Slow-Roll and Exact Power Spectra with CMB Data
Jerome Martin, Christophe Ringeval
The implications of the WMAP (Wilkinson Microwave Anisotropy Probe) third year data for inflation are investigated using both the slow-roll approximation and an exact numerical int…
Testing for w<-1 in the Solar System
Jerome Martin, Carlo Schimd, Jean-Philippe Uzan
In scalar-tensor theories of gravity, the equation of state of dark energy, w, can become smaller than -1 without violating any energy condition. The value of w today is tied to th…
Coupling Quintessence to Inflation in Supergravity
Philippe Brax, Jerome Martin
The evolution of the quintessence field during a phase of chaotic inflation is studied. The inflaton and the quintesssence field are described in a supergravity framework where the…
Inflation: Where Do We Stand?
Jerome Martin
In this short review, the predictions of inflation are presented and compared to the most recent measurements of the Cosmic Microwave Background (CMB) anisotropy. It is argued that…
Stochastic Quintessence
Jerome Martin, Marcello A. Musso
The behavior of the quintessence field is studied during inflation. In order to have a satisfactory model of dark energy, the quintessence field value today should be as insensible…
Addendum to "Superimposed Oscillations in the WMAP Data?"
Jerome Martin, Christophe Ringeval
We elaborate further on the possibility that the inflationary primordial power spectrum contains superimposed oscillations. We study various effects which could influence the calcu…
Inflation and Precision Cosmology
Jerome Martin
A brief review of inflation is presented. After having demonstrated the generality of the inflationary mechanism, the emphasize is put on its simplest realization, namely the singl…
On the "Causality Argument" in Bouncing Cosmologies
Jerome Martin, Patrick Peter
We exhibit a situation in which cosmological perturbations of astrophysical relevance propagating through a bounce are affected in a scale-dependent way. Involving only the evoluti…
Superimposed Oscillations in the WMAP Data?
Jerome Martin, Christophe Ringeval
The possibility that the cosmic variance outliers present in the recently released WMAP multipole moments are due to oscillations in the primordial power spectrum is investigated.…
Quintessence and the accelerating universe
Philippe Brax, Jerome Martin
Observations seem to indicate that our universe is presently accelerating due to the presence of dark energy. Quintessence represents a possible way to model the dark energy. In th…
WKB approximation for inflationary cosmological perturbations
Jerome Martin, Dominik J. Schwarz
A new method for predicting inflationary cosmological perturbations, based on the Wentzel-Kramers-Brillouin (WKB) approximation, is presented. A general expression for the WKB scal…
Non-vacuum initial states for the cosmological perturbations and the back-reaction problem of inflation
Alejandro Gangui, Jerome Martin, Mairi Sakellariadou
In the framework of Inflationary theory, the assumption that the quantum state of the perturbations is a non-vacuum state leads to a difficulty: non-vacuum initial states imply, in…
Inflation and non--Gaussianity
Alejandro Gangui, Jerome Martin, Mairi Sakellariadou
We study non-Gaussian signatures on the cosmic microwave background (CMB) radiation predicted within inflationary models with non-vacuum initial states for cosmological perturbatio…
Cosmological parameter estimation and the inflationary cosmology
Samuel M. Leach, Andrew R. Liddle, Jerome Martin +1
We consider approaches to cosmological parameter estimation in the inflationary cosmology, focussing on the required accuracy of the initial power spectra. Parametrizing the spectr…
A Cosmological Window on Trans-Planckian Physics
Jerome Martin, Robert H. Brandenberger
In the framework of inflation, scales which nowadays correspond to large scale structures were smaller than the Planck length at the beginning of inflation. Therefore, measurements…
Precision of inflationary predictions and recent CMB anisotropy data
Dominik J. Schwarz, Jerome Martin, Alain Riazuelo
Inflationary predictions of the cosmic microwave background anisotropy are often based on the slow-roll approximation. We study the precision of these predictions and compare them…
Slow-roll inflation and CMB anisotropy data
Jerome Martin, Alain Riazuelo, Dominik J. Schwarz
We emphasize that the estimation of cosmological parameters from cosmic microwave background (CMB) anisotropy data, such as the recent high resolution maps from BOOMERanG and MAXIM…
High Energy Physics and Quintessence
Philippe Brax, Jerome Martin
It is shown that any realistic model of quintessence should be based on Supergravity (SUGRA) since the value of the quintessence field on the attractor is approximately the Planck…