Diffusion and Coulomb separation of ions in dense plasma

M.B. Beznogov1, D.G. Yakovlev2

1Academic University, 8/3 Khlopina Str., Saint Petersburg, 194021, Russia
2Ioffe Physical-Technical Institute, Politekhnicheskaya 26, 194021 Saint Petersburg, Russia

We analyze diffusion equations in strongly coupled Coulomb mixtures of ions in dense stellar matter. Strong coupling of ions in the presence of gravitational forces and electric fields (induced by plasma polarization in the presence of gravity) produces a specific diffusion current which can separate ions with the same A/Z ratios (of mass to charge numbers) but different Z. This Coulomb separation of ions can be important for evolution of white dwarfs and neutron stars.

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