Real or Imaginary? (On pair creation in de Sitter space)

Details Real or Imaginary? (On pair creation in de Sitter space) Real or Imaginary? (On pair creation in de Sitter space)

2009-09-21

arxiv.org/abs/0909.3722v6

Mod.Phys.Lett.A25:2815-2823,2010

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, Final version to appear in MPLA

Scientific paper

Using properly defined Feynman propagator we obtain non--zero imaginary contribution to the scalar field effective action in even dimensional de Sitter space. Such a propagator follows from the path integral in de Sitter space and obeys composition principle proposed in arXiv:0709.2899. The obtained expression for the effective action shows particle production with the Gibbons--Hawking rate.

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