The RR charges of the A-type Gepner models

@article{Caviezel2006TheRC,
  title={The RR charges of the A-type Gepner models},
  author={Claudio Caviezel and Stefan Fredenhagen and Matthias R. Gaberdiel},
  journal={Journal of High Energy Physics},
  year={2006},
  volume={2006},
  pages={111-111}
}
It is shown that the RR charges of Gepner models are not all accounted for by the usual tensor product and permutation branes. In order to characterise the missing D-branes we study the matrix factorisation approach to the description of D-branes for Gepner models. For each of the A-type models we identify a set of matrix factorisations whose charges generate the full lattice of quantised charges. The additional factorisations that are required correspond to generalised permutation branes. 

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