Gauge-invariant metric fluctuations from NKK theory of gravity: de Sitter expansion

被引：10
|
作者：
Aguilar, JEM
Anabitarte, M
Bellini, M
机构：
[1] Univ Mar del Plata, Dept Fis, Fac Ciencias Exactas & Nat, RA-7600 Mar Del Plata, Argentina
[2] Consejo Nacl Invest Cient & Tecn, Consejo Nacl Ciencia & Tecnol, RA-1033 Buenos Aires, DF, Argentina
来源：
PHYSICS LETTERS B | 2006年 / 632卷 / 01期
关键词：
D O I：
10.1016/j.physletb.2005.10.037
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In this Letter we study gauge-invariant metric fluctuations from a noncompact Kaluza-Klein (NKK) theory of gravity in de Sitter expansion. We recover the well-known result 8 rho/rho/ similar or equal to 2 Phi, obtained from the standard 4D semiclassical approach to inflation. The spectrum for these fluctuations should be dependent of the fifth (spatial-like) coordinate. (c) 2005 Elsevier B.V. All rights reserved.
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页码：6 / 12
页数：7
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