TY - JOUR
T1 - Density perturbations in multifield inflationary models
AU - Mukhanov, V. F.
AU - Steinhardt, Paul J.
N1 - Funding Information:
We thank G. Huey for suggestions for improving the manuscript. This research was supported by the Department of Energy at Penn, DE-FG02-95ER40893 (PJS), and by the Tomalla Foundation (VM).
PY - 1998/3/12
Y1 - 1998/3/12
N2 - We derive a closed-form, analytical expression for the spectrum of long-wavelength density perturbations in inflationary models with two (or more) inflaton degrees of freedom that is valid in the slow-roll approximation. We illustrate several classes of potentials for which this expression reduces to a simple, algebraic expression.
AB - We derive a closed-form, analytical expression for the spectrum of long-wavelength density perturbations in inflationary models with two (or more) inflaton degrees of freedom that is valid in the slow-roll approximation. We illustrate several classes of potentials for which this expression reduces to a simple, algebraic expression.
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U2 - 10.1016/S0370-2693(98)00032-X
DO - 10.1016/S0370-2693(98)00032-X
M3 - Article
AN - SCOPUS:0039397951
SN - 0370-2693
VL - 422
SP - 52
EP - 60
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-4
ER -