2012-02-10

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Alexandar Dolgov (Ferrara)

Title: "Electric and magnetic screening in plasma with charged Bose-Einstein condensate".

Abstract:

Screening of impurities in plasma with Bose-Einstein condensate of  charged scalar of vector fields
is studied. It is shown that it is drastically different from the usual Debye screening, demonstrating
quite unusual features. In the case of charged vector field it may condense either in ferromagnetic
or antiferromagnetic state. If ferromagnetic state is favorable, the vector boson condensation in the
early universe might create quite strong magnetic fields at large scales. They could be seeds for
galactic magnetic field generation.

The calculations are done from the first principles at a simple level and no knowledge of
thermal field theory is necessary.