Static Einstein's Universe as a Quantum Solution of Causal Quantum   Gravity
  We shall in the framework of Bohmian quantum gravity show that it is possible to find a {\it pure} quantum state which leads to the static Einstein universe whose classical counterpart is flat space--time. We obtain the solution not only in the long--wavelength approximation but also exactly. 
A. Shojai, F. Shojai, N. Dadhich