Phantom without UV pathology

Phantom without UV pathology
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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
V. Rubakov
中科院分区:
医学3区
文献类型:
--
作者:
V. Rubakov

文献摘要

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我们提出了一个简单的模型,在该模型中,弱能量条件是违反空间均匀的,缓慢发展的领域。在闵可夫斯基空间中,从低尺度到紫外截止尺度的空间动量范围内,Lorentz破坏背景激发不包含鬼、快子和超光速模,而在p2 <p2时,快子和鬼可能存在。我们表明,在没有其他物质的情况下,慢滚宇宙学区域是可能的;在这个区域p + ρ < 0,但均匀性和各向同性并没有完全被破坏(在微调的代价下),因为对于给定的共形动量,快子模式在足够短的时间内增长。
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.