Long-wavelength modes of cosmological scalar fields

被引：6
|
作者：
Jankiewicz, Marcin [1 ]
Kephart, Thomas W. [1 ]
机构：
[1] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
来源：
PHYSICAL REVIEW D | 2006年 / 73卷 / 12期
关键词：
D O I：
10.1103/PhysRevD.73.123514
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We give a numerical analysis of long-wavelength modes in the WKB approximation of cosmological scalar fields coupled to gravity via xi phi R-2. 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.
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页数：8
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