Phantom without UV pathology

Details Phantom without UV pathology Phantom without UV pathology

2006-04-21

arxiv.org/abs/hep-th/0604153v2

Theor.Math.Phys.149:1651-1664,2006; Teor.Mat.Fiz.149:409-426,2006

Physics

High Energy Physics

High Energy Physics - Theory

19 pages. Several misprints corrected, several points clarified, several references added

Scientific paper

10.1007/s11232-006-0149-7

We present a simple model in which the weak energy condition is violated for spatially homogeneous, slowly evolving fields. The excitations about Lorentz-violating background in Minkowski space do not contain ghosts, tachyons or superluminal modes at spatial momenta ranging from some low scale epsilon to the UV cutoff scale, while tachyons and possibly ghosts do exist at p^2 < epsilon^2. We show that in the absence of other matter, slow roll cosmological regime is possible; in this regime p+rho<0, and yet homogeneity and isotropy are not completely spoiled (at the expence of fine-tuning), since for given conformal momentum, the tachyon mode grows for short enough period of time.

Affiliated with

Also associated with

No associations

Rating

Phantom without UV pathology does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Phantom without UV pathology, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phantom without UV pathology will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-627193