On Ramond-Ramond fields and K-theory

@article{Freed2000OnRF,
  title={On Ramond-Ramond fields and K-theory},
  author={D. Freed and M. Hopkins},
  journal={Journal of High Energy Physics},
  year={2000},
  volume={2000},
  pages={044-044}
}
  • D. Freed, M. Hopkins
  • Published 2000
  • Physics, Mathematics
  • Journal of High Energy Physics
  • A recent paper by Moore and Witten [1] explained that Ramond-Ramond fields in type-II superstring theory have a global meaning in K-theory. In this note we amplify and generalize some points raised in that paper. In particular, we express the coupling of the Ramond-Ramond fields to D-branes in a K-theoretic framework and show that the anomaly in this coupling exactly cancels the anomaly from the fermions on the brane, both in type IIA and type IIB. 
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