4 research outputs found
Ferromagnetic Domain Wall and Primeval Magnetic Field
We show that coherent magnetic field is generated spontaneously when a large
domain wall is created in the early universe. It is caused by two dimensional
massless fermions bounded to the domain wall soliton. We point out that the
magnetic field is a candidate of primordial magnetic field.Comment: zero point energy missed in previous version is include
Spontaneous Magnetization of Axion Domain Wall and Primordial Magnetic Field
We show that axion domain walls gain spontaneous magnetization in early
universe by trapping either electrons or positrons with their spins polarized.
The reason is that the walls produces an attractive potential for these
particles. We argue that the wall bounded by an axionic superconducting string
leaves a magnetic field after its decay. We obtain a field
Gauss on the scale of horizon at the recombination.Comment: 10 Pages, Revte