1/2-BPS membrane instantons in AdS${}_4\times$S${}^7/{\mathbf{Z}}_k$

Jaemo Park, Hyeonjoon Shin

According to the covariant open superstring description of D-branes in the AdS${}_4\times {\mathbf{CP}}^3$ background, 1/2-BPS D2-branes are purely instantonic. Based on this and by t…