Cosmological perturbations with multiple scalar fields

被引：53

作者：

Hwang, JC ^{[1
]}

Noh, H

机构：

[1] Kyungpook Natl Univ, Dept Astron & Atmospher Sci, Taegu 702701, South Korea

[2] Korea Astron Observ, Taejon, South Korea

来源：

PHYSICS LETTERS B | 2000年 / 495卷 / 3-4期

基金：

新加坡国家研究基金会;

关键词：

D O I：

10.1016/S0370-2693(00)01253-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We consider the evolution of perturbed cosmological spacetime with multiple scalar fields in Einstein gravity. A complete set of scalar-type perturbation equations is presented in a gauge-ready form, and the closed sets of second-order differential equations in several useful forms are derived. Conserved behaviors of the perturbed three-space curvature in the comoving gauge, phi (nu), under several conditions are clarified. Under the slow-roll conditions, the adiabatic and isocurvature modes decouple from each other, and in the large-scale limit we have (i) the adiabatic mode is generally conserved, (ii) for a couple of special potential the isocurvature modes decouple from each other and are described by conserved quantities, (iii) in the two field system, the isocurvature mode is described by a conserved quantity for the general potential. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：277 / 283

页数：7

共 38 条

[1]

BARDEEN JM, 1988, CCAST WL SW, V5, P1

[2] SPONTANEOUS CREATION OF ALMOST SCALE-FREE DENSITY PERTURBATIONS IN AN INFLATIONARY UNIVERSE [J].

BARDEEN, JM ;

STEINHARDT, PJ ;

TURNER, MS .

PHYSICAL REVIEW D, 1983, 28 (04) :679-693

[3] A flat Universe from high-resolution maps of the cosmic microwave background radiation [J].

de Bernardis, P ;

Ade, PAR ;

Bock, JJ ;

Bond, JR ;

Borrill, J ;

Boscaleri, A ;

Coble, K ;

Crill, BP ;

De Gasperis, G ;

Farese, PC ;

Ferreira, PG ;

Ganga, K ;

Giacometti, M ;

Hivon, E ;

Hristov, VV ;

Iacoangeli, A ;

Jaffe, AH ;

Lange, AE ;

Martinis, L ;

Masi, S ;

Mason, PV ;

Mauskopf, PD ;

Melchiorri, A ;

Miglio, L ;

Montroy, T ;

Netterfield, CB ;

Pascale, E ;

Piacentini, F ;

Pogosyan, D ;

Prunet, S ;

Rao, S ;

Romeo, G ;

Ruhl, JE ;

Scaramuzzi, F ;

Sforna, D ;

Vittorio, N .

NATURE, 2000, 404 (6781) :955-959

[4] Parametric amplification of metric fluctuations during reheating in two field models [J].

Finelli, F ;

Brandenberger, R .

PHYSICAL REVIEW D, 2000, 62 (08) :1-12

[5] Constraints from inflation on scalar-tensor gravity theories [J].

GarciaBellido, J ;

Wands, D .

PHYSICAL REVIEW D, 1995, 52 (12) :6739-6749

[6] Metric perturbations in two-field inflation [J].

GarciaBellido, J ;

Wands, D .

PHYSICAL REVIEW D, 1996, 53 (10) :5437-5445

[7]

GLINER EB, 1966, ZH EKSP TEOR FIZ, V22, P378

[8]

GORDON C, ASTROPH0009131

[9]

Gottlober S., 1992, International Journal of Modern Physics D, V1, P257, DOI 10.1142/S0218271892000136

[10] ANALYSIS OF INFLATION DRIVEN BY A SCALAR FIELD AND A CURVATURE-SQUARED TERM [J].

GOTTLOBER, S ;

MULLER, V ;

STAROBINSKY, AA .

PHYSICAL REVIEW D, 1991, 43 (08) :2510-2520

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