Electrical conductivity in the early universe

Abstract

We solve numerically the Boltzmann equation in the early universe in the presence of a constant electric field and find the electrical conductivity σ in the range 1 MeV ∼ T ∼ MW . The main contribution to σ is shown to be due to leptonic interactions. For T ∼ 100 MeV we find σ ≃ 0.76T while at T ≃ MW we obtain σ ≃ 6.7T 1jtahonen@rock.helsinki.fi; 2enqvist… (More)

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