Noncritical M-theory: Three Dimensions

At the macrosopic level we study candidate 3D effective field theories associated to M theory in three dimensions. These represent analogs of 11D supergravity for eleven dimensional M-theory. At the microscopic level we study various world volume (WV) theories that can be used to relate world sheet (WS) theories of two dimensional strings. These are better defined for 3D targets than their 11D counterparts in part because there are no transverse dimensions. In particular M-theory on the target manifold AdS3 and RxSL(2,R)/SO(2) are studied using a supermembrane and WV 3d gravity approach.