String instanton in AdS(4)xCP(3)
arXiv:0911.5228 · doi:10.1007/JHEP05(2010)009
Abstract
We study the string instanton wrapping a non-trivial two-cycle in CP(3) of the type IIA string theory compactified on AdS_4 x CP(3) superspace and find that it has twelve fermionic zero modes associated with 1/2 of the supersymmetry of the background thus manifesting that this classical instanton configuration is 1/2 BPS
1+28 pages; v2: Section 3.1 extended, summary and discussion added; v3: added references, clarifications and Section 4.2 on supersymmetry properties of the instanton