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Discrete Deformations in Type I Vacua
Carlo Angelantonj, Ralph Blumenhagen
We study supersymmetric orientifolds where the world-sheet parity transformation is combined with a conjugation of some compact complex coordinates. We investigate their T-duality…
Non-Tachyonic Type 0B Orientifolds, Non-Supersymmetric Gauge Theories and Cosmological RG Flow
Carlo Angelantonj, Adi Armoni
We discuss gauge theories on D3 branes embedded in special non-tachyonic orientifolds of the 0B string theory. In general, they correspond to non-supersymmetric SU(N) gauge theorie…
A Note on non-supersymmetric open-string orbifolds with a quantised B_ab
Carlo Angelantonj
In this short note we review the main features of open-string orbifolds with a quantised flux for the NS-NS antisymmetric tensor in the context of the open descendants of non-super…
Comments on Open-String Orbifolds with a Non-Vanishing B_{ab}
Carlo Angelantonj
We study the effect of a non-vanishing flux for the NS-NS antisymmetric tensor in open-string orbifolds. As in toroidal models, the total dimension of the Chan-Paton gauge group is…
Non-Supersymmetric Open String Vacua
Carlo Angelantonj
We review the construction of non-supersymmetric open string vacua in various dimensions. They can be obtained either projecting the (compactified) non-supersymmetric 0B theory, or…
Non-Supersymmetric Type I Strings with Zero Vacuum Energy
C. Angelantonj, I. Antoniadis, K. Foerger
We study open descendants of non-supersymmetric type IIB asymmetric (freely acting) orbifolds with zero cosmological constant. A generic feature of these models is that supersymmet…