Phantom without UV pathology
Phantom without UV pathology
复制标题
无紫外线病理学的体模
DOI:
10.1007/s11232-006-0149-7
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发表时间:
2006
影响因子:
4
通讯作者:
V. Rubakov
中科院分区:
文献类型:
--
作者:
V. Rubakov
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 ǫ to the ultraviolet cutoff scale, while tachyons and possibly ghosts do exist at p 2 < ǫ 2 . We show that in the absence of other matter, slow roll cosmological regime is possible; in this regime p + ρ < 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.