The causal interpretation of dust and radiation fluid non-singular quantum cosmologies

We apply the causal interpretation of quantum mechanics to homogeneous and isotropic quantum cosmology where the sources of the gravitational field are either dust or radiation perfect fluids. We find non-singular quantum trajectories which tend to the classical one when the scale factor becomes much larger than its minimum size. There are no particle horizons. (C) 1998 Published by Elsevier Science B.V.