426 citations · 3.4k across the 63 of their papers we have counts for
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hep-th2008★ 17 cited
On the Symmetries of Classical String Theory
Constantin Bachas
I discuss some aspects of conformal defects and conformal interfaces in two spacetime dimensions. Special emphasis is placed on their role as spectrum-generating symmetries of clas…
hep-th2008★ 29 cited
Comments on Orientifolds without Vector Structure
Constantin Bachas, Massimo Bianchi, Ralph Blumenhagen +2
We revisit type I compactifications with a Spin(32)/Z2 gauge bundle that admits no vector structure. We elucidate the relation of this Z2 obstruction to discrete B-field flux and t…