D-Branes and Vanishing Cycles in Higher Dimensions

Details D-Branes and Vanishing Cycles in Higher Dimensions D-Branes and Vanishing Cycles in Higher Dimensions

2001-02-20

arxiv.org/abs/hep-th/0102133v1

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, LaTEX, 7 figures, TEX three times for proper cross-referencing

Scientific paper

We investigate the quantum volume of D-branes wrapped around cycles of various dimension in Calabi-Yau fourfolds and fivefolds. Examining the cases of the sextic and heptic hypersurface Calabi-Yau varieties, as well as one example in weighted projective space, we find expressions for periods which vanish at the singular point analogous to the conifold point. As in the known three-dimensional cases, it is the top dimensional cycle which attains zero quantum volume, even though lower dimensional cycles remain non-degenerate, indicating this phenomena to be a general feature of quantum geometry.

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