Published September 16, 2004
| Submitted + Published
Journal Article
Open
Gradient instability for ω < - 1
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.
Additional Information
© 2004 Elsevier B.V. Open Access funded by SCOAP3 - Sponsoring Consortium for Open Access Publishing in Particle Physics Under a Creative Commons license (CC-By). Received 13 June 2004, Revised 7 July 2004, Accepted 7 July 2004, Available online 21 July 2004. The authors would like to thank N. Arkani-Hamed, X. Calmet, M. Graesser, M. Kamionkowski, and E. Linder for discussions. This work was supported in part under DOE contracts DE-FG06-85ER40224 and DE-FG03-92ER40701.Attached Files
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Additional details
- Eprint ID
- 78897
- Resolver ID
- CaltechAUTHORS:20170710-131411758
- DE-FG06-85ER40224
- Department of Energy (DOE)
- DE-FG03-92ER40701
- Department of Energy (DOE)
- Created
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2017-07-11Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field