Long-Wavelength Modes of Cosmological Scalar Fields
Marcin Jankiewicz, Thomas W. Kephart
Abstract
We give a numerical analysis of long-wavelength modes in the WKB approximation of cosmological scalar fields coupled to gravity via ξϕ2R. Massless fields are coupled conformally at ξ=1/6. Conformality can be preserved for fields of nonzero mass by shifting ξ. We discuss implications for density perturbations.
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