Type I background fields in terms of type IIB ones

Abstract

We choose such boundary conditions for open IIB superstring theory which preserve N=1 SUSY. The explicite solution of the boundary conditions yields effective theory which is symmetric under world-sheet parity transformation $\Omega :\sigma \to -\sigma$. We recognize effective theory as closed type I superstring theory. Its background fields,beside known $\Omega$ even fields of the initial IIB theory, contain improvements quadratic in $\Omega$ odd ones.

4 revtex pages, no figures

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• Fermionic T-duality and momenta noncommutativity
• Fermionic T-duality in fermionic double space
• Noncommutativity relations in type IIB theory and their supersymmetry
• Dirichlet boundary conditions in type IIB superstring theory and fermionic T-duality