Astrophysical applications of quantum corrections to the equation of state of a plasma

The quantum electrodynamic correction to the equation of state of a plasma at finite temperature is applied to the areas of solar physics and cosmology. A previously neglected, purely quantum term in the correction is found to change the equation of state in the solar core by -0. 37%, which is roughly estimated to decrease the calculated high energy neutrino flux by about 2. 2%. We also show that a previous calculation of the effect of this correction on big bang nucleosynthesis is incomplete, and we estimate the correction to the primordial helium abundance Y to be =1. 410^-4. A physical explanation for the correction is found in terms of corrections to the dispersion relation of the electron, positron, and photon.