  For a large region of parameter space involving the cosmological constant and
mass parameters, we discuss fluctuating spacetime solutions that are
effectively Minkowskian on large time and distance scales. Rapid, small
amplitude oscillations in the scale factor have a frequency determined by the
size of a negative cosmological constant. A field with modes of negative energy
is required. If it is gravity that induces a coupling between the ghost-like
and normal fields, we find that this results in stochastic rather than unstable
behavior. The negative energy modes may also permit the existence of Lorentz
invariant fluctuating solutions of finite energy density. Finally we consider
higher derivative gravity theories and find oscillating metric solutions in
these theories without the addition of other fields.
