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arXiv 1004.4947hep-thastro-ph.COgr-qc
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Lee-Wick结构的辐射反弹?

A Radiation Bounce from the Lee-Wick Construction?

Johanna Karouby, Robert Brandenberger

摘要:

最近人们认识到,在均匀和各向同性的宇宙学背景下,由李-威克标准模型的标量场扇区模拟的物质产生了一种跳跃的宇宙学。然而,由无压力物质引起的反弹宇宙学通常对相对论性物质(即辐射)的加入不稳定。在这里,我们研究的可能性,获得一个弹跳宇宙学,如果我们不仅添加辐射,但它的李-威克伙伴,物质部门。我们发现,在一般情况下,没有反弹发生。获得反弹的唯一方法是选择具有辐射场及其Lee-Wick伙伴的非常特殊相位的初始条件。

英文摘要:

It was recently realized that matter modeled by the scalar field sector of the Lee-Wick Standard Model yields, in the context of a homogeneous and isotropic cosmological background, a bouncing cosmology. However, bouncing cosmologies induced by pressure-less matter are in general unstable to the addition of relativistic matter (i.e. radiation). Here we study the possibility of obtaining a bouncing cosmology if we add not only radiation, but also its Lee-Wick partner, to the matter sector. We find that, in general, no bounce occurs. The only way to obtain a bounce is to choose initial conditions with very special phases of the radiation field and its Lee-Wick partner.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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