A. Emir G�mr�k�o?lu
Low energy ghosts and the Jeans’ instability
G�mr�k�o?lu, A. Emir; Mukohyama, Shinji; Sotiriou, Thomas P.
Authors
Shinji Mukohyama
THOMAS SOTIRIOU Thomas.Sotiriou@nottingham.ac.uk
Professor of Gravitational Physics
Abstract
We show that a massless canonical scalar field minimally coupled to general relativity can become a tachyonic ghost at low energies around a background in which the scalar’s gradient is spacelike. By performing a canonical transformation we demonstrate that this low energy ghost can be recast, at the level of the action, in a form of a fluid that undergoes a Jeans-like instability affecting only modes with large wavelength. This illustrates that low energy tachyonic ghosts do not lead to a catastrophic quantum vacuum instability, unlike the usual high-energy ghost degrees of freedom.
Citation
Gümrükçüoğlu, A. E., Mukohyama, S., & Sotiriou, T. P. (2016). Low energy ghosts and the Jeans’ instability. Physical Review D, 94(6), Article 64001. https://doi.org/10.1103/PhysRevD.94.064001
Journal Article Type | Article |
---|---|
Acceptance Date | Aug 16, 2016 |
Publication Date | Sep 1, 2016 |
Deposit Date | Dec 21, 2016 |
Publicly Available Date | Dec 21, 2016 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 94 |
Issue | 6 |
Article Number | 64001 |
DOI | https://doi.org/10.1103/PhysRevD.94.064001 |
Public URL | https://nottingham-repository.worktribe.com/output/802869 |
Publisher URL | http://dx.doi.org/10.1103/PhysRevD.94.064001 |
Additional Information | ©2016 American Physical Society |
Contract Date | Dec 21, 2016 |
Files
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf
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