2k citations · 10.5k across the 73 of their papers we have counts for
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Gravitational waves in vector inflation
Alexey Golovnev, Viatcheslav Mukhanov, Vitaly Vanchurin
We discuss the gravitational waves (GW) in the context of vector inflation. We derive the action for tensor perturbations and find that tachyonic instabilities are present in most…
Vector Inflation
Alexey Golovnev, Viatcheslav Mukhanov, Vitaly Vanchurin
We propose a scenario where inflation is driven by non-minimally coupled massive vector fields. In an isotropic homogeneous universe these fields behave in presicely the same way a…
Enhancing the tensor-to-scalar ratio in simple inflation
V. Mukhanov, A. Vikman
We show that in theories with a nontrivial kinetic term the contribution of the gravitational waves to the CMB fluctuations can be substantially larger than that is naively expecte…
Inflation: Homogeneous Limit
V. Mukhanov
I review the motivation for the early-time cosmic acceleration stage in expanding universe and discuss simple inflationary scenarios. Preheating and reheating are considered in gre…
Post-inflationary behavior of adiabatic perturbations and tensor-to-scalar ratio
Andrei Linde, Viatcheslav Mukhanov, Misao Sasaki
We explain why it is so difficult and perhaps even impossible to increase the cosmological tensor-to-scalar perturbation ratio during the post-inflationary evolution of the univers…
CMB, Quantum Fluctuations and the Predictive Power of Inflation
V. Mukhanov
I comment on the predictive power of inflation and recent CMB measurements.
CMB-slow, or How to Estimate Cosmological Parameters by Hand
V. Mukhanov
I derive analytically the spectrum of the CMB fluctuations. The final result for C_l is presented in terms of elementary functions with an explicit dependence on the basic cosmolog…
Measuring the Speed of Sound of Quintessence
Joel K. Erickson, R. R. Caldwell, Paul J. Steinhardt +2
Quintessence, a time-varying energy component that may account for the accelerated expansion of the universe, can be characterized by its equation of state and sound speed. In this…
Essentials of k-essence
C. Armendariz-Picon, V. Mukhanov, Paul J. Steinhardt
We recently introduced the concept of "k-essence" as a dynamical solution for explaining naturally why the universe has entered an epoch of accelerated expansion at a late stage of…
A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
C. Armendariz-Picon, V. Mukhanov, Paul J. Steinhardt
Increasing evidence suggests that most of the energy density of the universe consists of a dark energy component with negative pressure, a ``cosmological constant" that causes the…
Eternal inflation, black holes, and the future of civilizations
J. Garriga, V. F. Mukhanov, K. D. Olum +1
We discuss the large-scale structure of the universe in inflationary cosmology and the implications that it may have for the long-term future of civilizations. Although each civili…
On the Problem of Predicting Inflationary Perturbations
Limin Wang, V. F. Mukhanov, Paul J. Steinhardt
We examine the theoretical foundations of standard methods for computing density perturbations in inflationary models. We find that: (1) the time-delay formalism (introduced by Gut…
On classical anisotropies in models of Open Inflation
Jaume Garriga, V. F. Mukhanov
In the simplest model of open inflation there are two inflaton fields decoupled from each other. One of them, the tunneling field, produces a first stage of inflation which prepare…
Nongaussian Isocurvature Perturbations from Inflation
A. Linde, V. Mukhanov
We present a class of very simple inflationary models of two scalar fields which leads to nongaussian isothermal perturbations with "blue" spectrum, n > 1. One of the models is ins…
Classical and Quantum Theory of Perturbations in Inflationary Universe Models
R. Brandenberger, H. Feldman, V. Mukhanov
A brief introduction to the gauge invariant classical and quantum theory of cosmological perturbations is given. The formalism is applied to inflationary Universe models and yields…
Entropy of a Classical Stochastic Field and Cosmological Perturbation
R. Brandenberger, V. Mukhanov, T. Prokopec
We propose a general definition of nonequilibrium entropy of a classical stochastic field. As an example of particular interest in cosmology we apply this definition to compute the…