148 citations · 1.1k across the 45 of their papers we have counts for
18 papers · 1 filter
Phase transitions in the early and the present Universe
D. Boyanovsky, H. J. de Vega, D. J. Schwarz
The evolution of the Universe is the ultimate laboratory to study fundamental physics across energy scales that span about 25 orders of magnitude: from the grand unification scale…
QCD Pomerons at Non-Zero Temperature
H. J. de Vega, L. N. Lipatov
We consider the QCD scattering amplitudes at high energies sqrt{s} and fixed momentum transfers sqrt{-t} in the leading logarithmic approximation at a non-zero temperature T in the…
Nonequilibrium pion dynamics near the critical point in a constituent quark model
D. Boyanovsky, H. J. de Vega, S. -Y. Wang
We study static and dynamical critical phenomena of chiral symmetry breaking in a two-flavor Nambu--Jona-Lasinio constituent quark model. We obtain the low-energy effective action…
Are direct photons a clean signal of a thermalized quark gluon plasma?
D. Boyanovsky, H. J. de Vega
Direct photon production from a quark gluon plasma (QGP) in thermal equilibrium is studied directly in real time. In contrast to the usual S-matrix calculations, the real time appr…
Out of Equilibrium Non-perturbative Quantum Field Dynamics in Homogeneous External Fields
F. J. Cao, H. J. de Vega
The quantum dynamics of the symmetry broken lambda (Phi^2)^2 scalar field theory in the presence of an homogeneous external field is investigated in the large N limit. We choose as…
Real Time Nonequilibrium Dynamics of Quantum Plasmas. Quantum Kinetics and the Dynamical Renormalization Group
H. J. de Vega
We implement the dynamical renormalization group (DRG) using the hard thermal loop (HTL) approximation for the real-time nonequilibrium dynamics in hot plasmas. The focus is on the…
Real-time nonequilibrium dynamics in hot QED plasmas: dynamical renormalization group approach
S. -Y. Wang, D. Boyanovsky, H. J. de Vega +1
We study the real-time nonequilibrium dynamics in hot QED plasmas implementing a dynamical renormalization group and using the hard thermal loop (HTL) approximation. The focus is o…
Non-equilibrium dynamics in quantum field theory at high density: the tsunami
F. J. Cao, H. J. de Vega
The dynamics of a dense relativistic quantum fluid out of thermodynamic equilibrium is studied in the framework of the Phi^4 scalar field theory in the large N limit. The time evol…
Dynamics of Symmetry Breaking Out of Equilibrium: From Condensed Matter to QCD and the Early Universe
D. Boyanovsky, H. J. de Vega
The dynamics of symmetry breaking during out of equilibrium phase transitions is a topic of great importance in many disciplines, from condensed matter to particle physics and earl…
Dynamical Renormalization Group Approach to Quantum Kinetics in Scalar and Gauge Theories
D. Boyanovsky, H. J. de Vega, S. -Y. Wang
We derive quantum kinetic equations from a quantum field theory implementing a diagrammatic perturbative expansion improved by a resummation via the dynamical renormalization group…
Non-equilibrium phase transitions in condensed matter and cosmology: spinodal decomposition, condensates and defects
D. Boyanovsky, H. J. de Vega, R. Holman
These lectures address the dynamics of phase ordering out of equilibrium in condensed matter and in quantum field theory in cosmological settings, emphasizing their similarities an…
Damping Rates and Mean Free Paths of Soft Fermion Collective Excitations in a Hot Fermion-Gauge-Scalar Theory
S. -Y. Wang, D. Boyanovsky, H. J. de Vega +2
We study the transport coefficients, damping rates and mean free paths of soft fermion collective excitations in a hot fermion-gauge-scalar plasma with the goal of understanding th…
Non-Equilibrium Real-Time Dynamics of Quantum Fields: Linear and Non-Linear Relaxation in Scalar and Gauge Theories
D. Boyanovsky, H. J. de Vega, R. Holman +3
The real time evolution of field condensates is solved for small and large field amplitudes in scalar theories.For small amplitudes,the quantum equations of motion for the condensa…
Evolution of Inhomogeneous Condensates: Self-consistent Variational Approach
D. Boyanovsky, F. Cooper, H. J. de Vega +1
We establish a self-consistent variational framework that allows us to study numerically the non-equilibrium evolution of non-perturbative inhomogeneous field configurations includ…
Out of Equilibrium Fields in Inflationary Dynamics. Density Fluctuations
D. Boyanovsky, D. Cormier, H. J. de Vega +2
The energy and time scales during the inflationary stage of the universe calls for an out of equilibrium quantum field treatment. Moreover, the high energy densities involved make…
Preheating in FRW Universes
D. Boyanovsky, D. Cormier, H. J. de Vega +3
The nonlinear time evolution of the quantum fields is studied in the O(N) model for large N in a radiation dominated FRW universe, with a view towards the phenomenon of explosive p…
Reply to: Comments on ``Analytic and Numerical Study of Preheating Dynamics''
D. Boyanovsky, H. J. de Vega, R. Holman
Reply to the comment by L. Kofman, A. Linde and A.A. Starobinsky (hep-ph/9608341) to our article ``Analytic and Numerical Study of Preheating Dynamics'' (hep-ph/9608205).
Dynamics of Cosmological Phase Transitions
D. Boyanovsky, H. J. de Vega, R. Holman
The dynamics of typical phase transitions is studied out of equilibrium in weakly coupled inflaton-type scalar field theories in Minkowski space. The shortcomings of the effective…