Supersymmetry and spin structures
arXiv:hep-th/0506229 · doi:10.1088/0264-9381/22/20/L01
Abstract
We construct examples of isometric M-theory backgrounds which preserve a different amount of supersymmetry depending on the choice of spin structure. These examples are of the form AdS_4 x L, where L is a seven-dimensional lens space whose fundamental group is cyclic of order 4k.
5 pages