148 citations · 1.1k across the 45 of their papers we have counts for
22 papers · 1 filter
Quantum slow-roll and quantum fast-roll inflationary initial conditions: CMB quadrupole suppression and further effects on the low CMB multipoles
F. J. Cao, H. J. de Vega, N. G. Sanchez
Quantum fast-roll initial conditions for the inflaton which are different from the classical fast-roll conditions and from the quantum slow-roll conditions can lead to inflation th…
The dark matter transfer function: free streaming, particle statistics and memory of gravitational clustering
D. Boyanovsky, H. J. de Vega, N. Sanchez
The transfer function of dark matter (DM) perturbations during matter domination is obtained by solving the collisionless Boltzmann-Vlasov equation. We find an \emph{exact}…
The CMB Quadrupole depression produced by early fast-roll inflation: MCMC analysis of WMAP and SDSS data
C. Destri, H. J. de Vega, N. G. Sanchez
Generically,the classical evolution of the inflaton has a brief fast roll stage that precedes the slow roll regime. The fast roll stage leads to a purely attractive potential for t…
MCMC analysis of WMAP3 and SDSS data points to broken symmetry inflaton potentials and provides a lower bound on the tensor to scalar ratio
C. Destri, H. J. de Vega, N. G. Sanchez
We perform a MCMC (Monte Carlo Markov Chains) analysis of the available CMB and LSS data (including the three years WMAP data) with single field slow-roll new inflation and chaotic…
New Inflation vs. Chaotic Inflation, Higher Degree Potentials and the Reconstruction Program in light of WMAP3
D. Boyanovsky, H. J. de Vega, C. M. Ho +1
The CMB power spectra are studied for different families of single field new and chaotic inflation models in the effective field theory approach to inflation. We implement a system…
CMB quadrupole suppression: I. Initial conditions of inflationary perturbations
D. Boyanovsky, H. J. de Vega, N. G. Sanchez
We investigate the issue of initial conditions of curvature and tensor perturba- tions at the beginning of slow roll inflation and their effect on the power spectra. Renormalizabil…
CMB quadrupole suppression: II. The early fast roll stage
D. Boyanovsky, H. J. de Vega, N. G. Sanchez
Within the effective field theory of inflation, an initialization of the classical dynamics of the inflaton with approximate equipartition between the kinetic and potential energy…
Single Field Inflation models allowed and ruled out by the three years WMAP data
H. J. de Vega, N. G. Sanchez
We study the single field slow-roll inflation models that better fit the available CMB and LSS data including the three years WMAP data: new inflation and hybrid inflation. We stud…
Clarifying Slow Roll Inflation and the Quantum Corrections to the Observable Power Spectra
D. Boyanovsky, H. J. de Vega, N. G. Sanchez
Slow-roll inflation can be studied as an effective field theory. The form of the inflaton potential consistent with the data is V(phi) = N M^4 w(phi/[sqrt{N} M_{Pl}]) where phi is…
Clarifying Inflation Models: Slow-roll as an expansion in 1/N_{efolds}
D. Boyanovsky, H. J. de Vega, N. G. Sanchez
Slow-roll inflation is studied as an effective field theory.We find as consistent form of the inflaton potential V(phi)=N M^4 w(phi/[sqrt{N}M_P]) where phi is the inflaton field, M…
Statistical Mechanics of the self-gravitating gas: thermodynamic limit, phase diagrams and fractal structures
H. J. de Vega, N. Sanchez
We provide a complete picture to the self-gravitating non-relativistic gas at thermal equilibrium using Monte Carlo simulations, analytic mean field methods (MF) and low density ex…
Primordial Magnetic Fields from Out of Equilibrium Cosmological Phase Transitions
D. Boyanovsky, H. J. de Vega
The universe cools down monotonically following its expansion.This generates a sequence of phase transitions. If a second order phase transition happens during the radiation domina…
Particle decay in inflationary cosmology
D. Boyanovsky, H. J. de Vega
We investigate the relaxation and decay of a particle during inflation by implementing the dynamical renormalization group. This investigation allows us to give a meaningful defini…
The quantum inflaton, primordial perturbations and CMB fluctuations
F. J. Cao, H. J. de Vega, N. G. Sanchez
We compute the primordial scalar, vector and tensor metric perturbations arising from quantum field inflation. Quantum field inflation takes into account the nonperturbative quantu…
The Cluster Expansion for the Self-Gravitating gas and the Thermodynamic Limit
H. J. de Vega, N. Sanchez
We develop the cluster expansion and the Mayer expansion for the self-gravitating thermal gas and prove the existence and stability of the thermodynamic limit N, V to infty with N/…
Primordial magnetic fields from cosmological phase transitions
D. Boyanovsky, H. J. de Vega, M. Simionato
We study the generation of large scale primordial magnetic fields by a cosmological phase transition during the radiation dominated era. The setting is a theory of N charged scalar…
The self-gravitating gas in the presence of dark energy
H. J. de Vega, J. A. Siebert
The non-relativistic self-gravitating gas in thermal equilibrium in the presence of a positive cosmological constant Lambda (dark energy) is investigated. The dark energy introduce…
Extreme Energy Cosmic Rays: Bottom-up vs. Top-down scenarii
H. J. de Vega, N. Sanchez
We present an overview on extreme energy cosmic rays (EECR) and the fundamental physics connected with them. The top-down and bottom-up scenarii are contrasted. We summarize the es…
Tsunami Inflation: Selfconsistent Quantum Dynamics
H. J. de Vega
The physics during the inflationary stage of the universe is of quantum nature involving extremely high energy densities. Moreover, it is out of equilibrium on a fastly expanding d…
Inflation from Tsunami-waves
D. Boyanovsky, F. J. Cao, H. J. de Vega
We investigate inflation driven by the evolution of highly excited quantum states within the framework of out of equilibrium field dynamics. These states are characterized by a non…
Out of Equilibrium Fields in Self-consistent Inflationary Dynamics. Density Fluctuations
D. Boyanovsky, H. J. de Vega
The physics during the inflationary stage of the universe is of quantum nature involving extremely high energy densities. Moreover, it is out of equilibrium on a fastly expanding d…
Self-Consistent Dynamics of Inflationary Phase Transitions
D. Boyanovsky, D. Cormier, H. J. de Vega +2
The physics of the inflationary universe requires the study of the out of equilibrium evolution of quantum fields in curved spacetime. We present the evolution for both the geometr…