Aganagic, MinaOoguri, HirosiVafa, CumrunYamazaki, Masahito2012-01-112011Aganagic, Mina, Hirosi Ooguri, Cumrun Vafa, and Masahito Yamazaki. 2011. Wall crossing and M-theory. Publications of the Research Institute for Mathematical Sciences 47(2): 569-584.0034-5318http://nrs.harvard.edu/urn-3:HUL.InstRepos:7561260We study BPS bound states of D0 and D2 branes on a single D6 brane wrapping a Calabi-Yau 3-fold X. When X has no compact 4-cyles, the BPS bound states are organized into a free field Fock space, whose generators correspond to BPS states of spinning M2 branes in M-theory compactified down to 5 dimensions by a Calabi-Yau 3-fold X. The generating function of the D-brane bound states is expressed as a reduction of the square of the topological string partition function, in all chambers of the Kahler moduli space.en-USstring theorybound stateFock spaceCalabi-Yau manifoldJournal Article2012-01-1110.2977/PRIMS/44