258 citations · 5.9k across the 125 of their papers we have counts for
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Magnetic Flux in Toroidal Type I Compactification
Ralph Blumenhagen, Lars Goerlich, Boris Kors +1
We discuss the compactification of type I strings on a torus with additional background gauge flux on the D9-branes. The solutions to the cancellation of the RR tadpoles display va…
A New Class of Supersymmetric Orientifolds with D-Branes at Angles
Ralph Blumenhagen, Lars Goerlich, Boris Kors
We describe a new class of supersymmetric orientifolds which combine the world-sheet parity transformation with a complex conjugation in the compact directions. As an example, we i…
Orientifolds of Non-Supersymmetric Asymmetric Orbifolds
Ralph Blumenhagen, Lars Goerlich
We consider certain four dimensional supersymmetric and non-supersymmetric asymmetric orbifolds with vanishing cosmological constant up to two loops and gauge the world sheet parit…