Lichnerowicz-Type Theorems for Self-gravitating Systems with Nonlinear   Electromagnetic Fields
  We consider a self-gravitating system containing a globally timelike Killing vector and a nonlinear Born-Infeld electromagnetic field and scalar fields. We prove that under certain boundary conditions (asymptotically flat/AdS) there can't be any nontrivial field configurations in the spacetime. To explore nontrivial solutions one should break any of the conditions we imposed. The case with another type of nonlinear electromagnetic field is also analyzed, and similar conclusions have been obtained under certain conditions. 
Li-Ming Cao, Yuxuan Peng, Jianfei Xu
gr-qc