Publications [#243408] of Robert Bryant

Papers Published

1. with Sharpe, E; Bryant, RL, D-branes and Spin^c-structures, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 450 no. 4 (1999), pp. 353-357, Elsevier BV [MR2000c:53054], [hep-th/98l2084], [doi]
   (last updated on 2025/03/31)

   Abstract:
   It was recently pointed out by E. Witten that for a D-brane to consistently wrap a submanifold of some manifold, the normal bundle must admit a Spin^c structure. We examine this constraint in the case of type II string compactifications with vanishing cosmological constant and argue that, in all such cases, the normal bundle to a sypersymmetric cycle is automatically Spin^c.