Low energy ghosts and the Jeans’ instabilityTools Gümrükçüoğlu, A. Emir, Mukohyama, Shinji and Sotiriou, Thomas P. (2016) Low energy ghosts and the Jeans’ instability. Physical Review D, 94 (6). 64001/1-64001/6. ISSN 2470-0029 Full text not available from this repository.
Official URL: http://dx.doi.org/10.1103/PhysRevD.94.064001
AbstractWe 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.
Actions (Archive Staff Only)
|
Tools
Tools
