Abstract
We study the formation of D and F cosmic strings inD-brane annihilation after brane inflation. We show thatD string formation by quantum de Sitter fluctuations isseverely suppressed, due to suppression of RR field fluctuationsin compact dimensions. We discuss the resonant mechanism ofproduction of D and F strings, which are formed as magneticand electric flux tubes of the two orthogonal gauge fieldsliving on the world-volume of the unstable brane. We outlinethe subsequent cosmological evolution of the D−F stringnetwork. We also compare the nature of these strings with theordinary cosmic strings and point out some differences andsimilarities.
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