  We consider the coupling of quantum fields to classical gravity in the
formalism of ensembles on configuration space, a model that allows a consistent
formulation of interacting classical and quantum systems. Explicit calculations
show that there are solutions for which two quantum fields are in an entangled
state, even though their interaction occurs solely via a common classical
gravitational field, and that such entangled solutions can evolve from
initially unentangled ones. These results support the observation of a previous
paper that an observed generation of entanglement would not provide a
definitive test of the nonclassical nature of gravity.
