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arXiv · hep-th/0306091

BPS orientifold planes from crosscap states in Calabi-Yau compactifications

L. R. Huiszoon·K. Schalm
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Abstract

We use the results of hep-th/0007174 on the simple current classification of open unoriented CFTs to construct half supersymmetry preserving crosscap states for rational Calabi-Yau compactifications. We show that the corresponding orientifold fixed planes obey the BPS-like relation M=exp(i*phi)Q. To prove this relation, it is essential that the worldsheet CFT properly includes the degrees of freedom from the uncompactified space-time component. The BPS-phase phi can be identified with the automorphism type of the crosscap states. To illustrate the method we compute crosscap states in Gepner models with each k_i odd.

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L. R. Huiszoon, K. Schalm. 2003-10-15. BPS orientifold planes from crosscap states in Calabi-Yau compactifications. https://doi.org/10.1088/1126-6708%2F2003%2F11%2F019

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