K-homology in algebraic geometry and D-branes

Details K-homology in algebraic geometry and D-branes K-homology in algebraic geometry and D-branes

2002-01-25

arxiv.org/abs/hep-th/0201202v2

Physics

High Energy Physics

High Energy Physics - Theory

11pages, minor changes, references added

Scientific paper

In this article, we study how the Grothendieck group of coherent sheaves can be used to describe D-branes. We show how global bound state construction in topological $K$-theory can be adapted to our context, showing that D-branes wrapping a subvariety are holomorphically classified by a relative $K$-group. By taking the duality between the relative $K$-groups and the $K$-homologies, we show that D-brane charge of type IIB superstrings is properly classified by the $K$-homology.

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