D-brane charges and K-homology

Abstract

It is argued that D-brane charge takes values in K-homology. For smooth manifolds with spin structure, this could explain why the phase factor $\Omega (x)$ calculated with a D-brane state x in IIB theory appears in Diaconescu, Moore and Witten's computation of the partition function of IIA string theory.

5 pages, RevTeX

References in corpus (1)

• Self-Duality, Ramond-Ramond Fields, and K-Theory

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