  We give a numerical analysis of long-wavelength modes in the WKB
approximation of cosmological scalar fields coupled to gravity via
$\xi\phi^{2}R$. Massless fields are coupled conformally at $\xi=1/6$.
Conformality can be preserved for fields of nonzero mass by shifting $\xi$. We
discuss implications for density perturbations.

High Energy Physics - Phenomenology;Astrophysics;General Relativity and Quantum Cosmology