On the Entanglement of Multiple CFTs via Rotating Black Hole Interior
  We study the minimal surfaces between two of the multiple boundaries of 3d maximally extended rotating eternal black hole. Via AdS/CFT, this corresponds to investigating the behavior of entanglements of the boundary CFT with multiple sectors. Non-trivial time evolutions of such entanglements detect the geometry inside the horizon, and behave differently depending on the choice of the two boundaries. 
Norihiro Iizuka, Noriaki Ogawa
hep-th