Gradient instability for w < -1

被引：98

作者：

Hsu, SDH ^{[1
]}

Jenkins, A

Wise, MB

机构：

[1] CALTECH, Pasadena, CA 91125 USA

[2] Univ Oregon, Inst Theoret Sci, Eugene, OR 97403 USA

[3] Univ Oregon, Dept Phys, Eugene, OR 97403 USA

来源：

PHYSICS LETTERS B | 2004年 / 597卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2004.07.025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that in single scalar field models of the dark energy with equations of state satisfying w p/rho < - 1, the effective Lagrangian for fluctuations about the homogeneous background has a wrong sign spatial kinetic term. In most cases, spatial gradients are ruled out by microwave background observations. The sign of w + I is not connected to the sign of the time derivative kinetic term in the effective Lagrangian. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：270 / 274

页数：5

共 22 条

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