Low energy ghosts and the Jeans’ instability

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Low energy ghosts and the Jeans’ instability

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 th...

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Bibliographic Details
Main Authors:	Gümrükçüoğlu, A. Emir, Mukohyama, Shinji, Sotiriou, Thomas P.
Format:	Article
Published:	American Physical Society 2016
Online Access:	https://eprints.nottingham.ac.uk/39500/

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