  Baryon inhomogeneitites formed in the early universe are important as they
affect the nucleosynthesis calculations. Since they are formed much before the
nucleosynthesis epoch, neutrino inflation plays a crucial role in damping out
these fluctuations. Now neutrinos, in turn, are affected by magnetic fields
which may be present in the early universe. In this work we study the evolution
of baryonic inhomogeneities due to neutrino induced dissipative processes in
the presence of a background magnetic field. We find that at higher
temperatures the dissipation of the inhomogeneities are enhanced as the
magnetic field increases. Our study also shows that at lower temperatures the
same magnetic field may produce less dissipation. Though we limit our study to
temperatures below the quark-hadron transition we do establish that magnetic
fields present in the early universe affect the dissipation of baryonic
inhomogeneities.
