Publications (14)
Mixed Cold-Hot Dark Matter Model with several Massive Neutrino Types
Dmitri Pogosyan, Alexei Starobinsky
Mixed cold-hot dark matter cosmological models (CHDM) with , approximately flat initial spectrum of adiabatic perturbations and 1, 2 or 3 types of massive neutrinos are…
Signatures of a Graviton Mass in the Cosmic Microwave Background
Sergei Dubovsky, Raphael Flauger, Alexei Starobinsky +1
There exist consistent low energy effective field theories describing gravity in the Higgs phase that allow the coexistence of massive gravitons and the conventional 1/r potential…
Prospects and Problems of Tachyon Matter Cosmology
Andrei Frolov, Lev Kofman, Alexei Starobinsky
We consider the evolution of FRW cosmological models and linear perturbations of tachyon matter rolling towards a minimum of its potential. The tachyon coupled to gravity is descri…
Comments on "Analytic and Numerical Study of Preheating Dynamics"
Lev Kofman, Andrei Linde, Alexei Starobinsky
In a recent paper Boyanovsky et al (hep-ph/9608205) studied preheating for a particular theory of the inflaton field. Although they results essentially confirm those of the origina…
The Case for a Positive Cosmological Lambda-term
Varun Sahni, Alexei Starobinsky
Recent observations of Type 1a supernovae indicating an accelerating universe have once more drawn attention to the possible existence, at the present epoch, of a small positive La…
Reheating after Inflation
Lev Kofman, Andrei Linde, Alexei Starobinsky
The theory of reheating of the Universe after inflation is developed. The transition from inflation to the hot Universe turns out to be strongly model-dependent and typically consi…
PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An Extended White Paper
PRISM Collaboration, Philippe André, Carlo Baccigalupi +140
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of the ESA Cosmic Visio…
Mixed Cold-Hot Dark Matter Model with Falling and Quasi-Flat Initial Perturbation Spectra
Dmitri Pogosyan, Alexei Starobinsky
The mixed cold-hot dark matter cosmological model (CHDM) with and a falling power-law initial spectrum of Gaussian adiabatic perturbations () is tested using rece…
Towards the Theory of Reheating After Inflation
Lev Kofman, Andrei Linde, Alexei Starobinsky
Reheating after inflation occurs due to particle production by the oscillating inflaton field. In this paper we describe the perturbative approach to reheating, and then concentrat…
Curing singularities in cosmological evolution of F(R) gravity
Stephen Appleby, Richard Battye, Alexei Starobinsky
We study modified gravity models which are capable of driving the accelerating epoch of the Universe at the present time whilst not destroying the standard Big Bang and infl…
Caustics in Tachyon Matter and Other Born-Infeld Scalars
Gary Felder, Lev Kofman, Alexei Starobinsky
We consider scalar Born-Infeld type theories with arbitrary potentials V(T) of a scalar field T. We find that for models with runaway potentials V(T) the generic inhomogeneous solu…
Structure of Resonance in Preheating after Inflation
Patrick Greene, Lev Kofman, Andrei Linde +1
We consider preheating in the theory , where the classical oscillating inflaton field decays into -particles and -particles. The paramet…
Stability properties of some perfect fluid cosmological models
Vittorio Gorini, Alexander Kamenshchik, Ugo Moschella +2
Flat FRW perfect fluid cosmologies can be reproduced as particular solutions of suitable field theoretical models. Here we investigate the stability of perfect fluid model trajecto…
Reconstructing Dark Energy
Varun Sahni, Alexei Starobinsky
This review summarizes recent attempts to reconstruct the expansion history of the Universe and to probe the nature of dark energy. Reconstruction methods can be broadly classified…