247 citations · 3.6k across the 88 of their papers we have counts for
5 papers · 2 filters
Quantum Transport Equations for a Scalar Field
Michael Joyce, Kimmo Kainulainen, Tomislav Prokopec
We derive quantum Boltzmann equations from Schwinger-Dyson equations in gradient expansion for a weakly coupled scalar field theory with a spatially varying mass. We find that at h…
On chaoticity of the amplification of the neutrino asymmetry in the early universe
Kari Enqvist, Kimmo Kainulainen, Antti Sorri
We consider numerically the growth of neutrino asymmetry in active-sterile neutrino oscillations in the early universe. It is shown that the final sign of the asymmetry can be high…
Quantum Boltzmann equations for mixing scalar fields
Michael Joyce, Kimmo Kainulainen, Tomislav Prokopec
We report on a work in progress, whose goal is a systematic field theoretical derivation of the quantum transport equations for baryon production in the electroweak plasma at a fir…
Periodic Instantons in SU(2) Yang-Mills-Higgs Theory
G. Bonini, S. Habib, E. Mottola +3
The properties of periodic instanton solutions of the classical SU(2) gauge theory with a Higgs doublet field are described analytically at low energies, and found numerically for…
The semiclassical propagator in field theory
Michael Joyce, Kimmo Kainulainen, Tomislav Prokopec
We consider scalar field theory in a changing background field. As an example we study the simple case of a spatially varying mass for which we construct the semiclassical approxim…