Magnetic-induced vacuum instability in de Sitter spacetime

Details Magnetic-induced vacuum instability in de Sitter spacetime Magnetic-induced vacuum instability in de Sitter spacetime

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phrvd..39.2959k&link_type=abstract

Physical Review D (Particles and Fields), Volume 39, Issue 10, 15 May 1989, pp.2959-2966

Physics

1

Theory Of Quantized Fields, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

We study the behavior of the vacuum expectation value of ||φ||2 under an external magnetic field in de Sitter spacetime, where φ is a charged scalar field. It is found that if a strong magnetic field is generated at early time in the inflationary Universe, the vacuum expectation value becomes negative and an instability of the vacuum arises. However, as time passes, this instability disappears and the vacuum becomes stable, except for massless and minimally coupled fields. Thus the magnetic field produced in the early Universe provides an important effect to the symmetry behavior of the inflationary-Universe model.

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