Is gravity inherent to relativistic many-particle systems?
  This paper discusses the somewhat unintuitive conjecture that many Lorentz-invariant many-particle models can be reinterpreted to satisfy the gtr field equations. It is shown that a careful remapping of coordinates yields a non-trivial Riemannian manifold. Furthermore an energy-momentum tensor is outlined and it is argued that it may converge to its classical counterpart in the macroscopic limit. These ideas could possibly be used to partially relieve us of some the resilient problems of adding spacetime curvature to modern QM theories. 
Niclas Thisell