Work

Gradient instability for w<−1

Year: 2004

Type: article

Abstract: We show that in single scalar field models of the dark energy with equations of state satisfying w≡p/ρ<−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+1 is not connected to the sign of the time derivative kinetic term in the effective Lagrangian.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2004.07.025

Authors: Stephen D.H. Hsu, Alejandro Jenkins, Mark B. Wise

Institution: California Institute of Technology

Language: Latvian

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid:

Funder: U.S. Department of Energy