In minimal warm inflation, perturbative dissipation from Landau damping and plasmon decay produces a third-time-derivative friction term linear in alpha, but slow-roll suppression makes it at least 10^-6 smaller than Chern-Simons diffusion friction.
Magnetic Screening in Hot Non-Abelian Gauge Theory
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We analyze the large distance and low-momentum behavior of the magnetic gluon propagator of the SU(2) gauge theory at finite temperature. Lattice calculations within the 4-dimensional as well as the effective, dimensionally reduced 3-dimensional gauge theories in generalized Landau gauges and MAG show that the magnetic propagator is strongly infrared suppressed in Landau gauges but stays large and finite in MAG. Despite these differences in the low-momentum behavior of the propagator calculated in different gauges the magnetic fields are exponentially screened in all gauges considered. From the propagator calculated in maximally Abelian gauge we find for the screening mass, m_M = (1.48 +/- 0.17) T at T=2 T_c.
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Perturbative Dissipation in Minimal Warm Inflation
In minimal warm inflation, perturbative dissipation from Landau damping and plasmon decay produces a third-time-derivative friction term linear in alpha, but slow-roll suppression makes it at least 10^-6 smaller than Chern-Simons diffusion friction.