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arXiv 1603.02573gr-qc
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绝热物质产生过程的宇宙学后果

Cosmological consequences of an adiabatic matter creation process

Rafael C. Nunes, Supriya Pan

摘要:

在本文中,我们研究了连续的物质创造的宇宙学后果与粒子的生产引力场作用于量子真空。为了说明这一点,被认为是三个唯象模型。每个模型都给出了一个等价的标量场描述。在绝热物质创生宇宙学的背景下,首次分析了对宇宙微波背景功率谱的影响。进一步,我们引入了一个模型独立的处理方法$Om$,它只依赖于哈勃膨胀率和宇宙学红移,通过对宇宙学常数的零检验来区分任何宇宙学模型和$Λ$ CDM,这意味着,对于任何两个红移,$z_1$,$z_2$,$Om (z)$都是相同的,即$Om (z_1)- Om (z_2)= 0$ .此外,这种诊断可以区分几个宇宙学模型,通过指示它们的典型/幻影行为,而不知道物质密度的准确值和哈勃参数的当前值。对于我们的模型,我们发现,粒子的产生率是成反比的$Om$。最后,考察了以视视界为界的广义热力学第二定律的有效性。

英文摘要:

In this paper we investigate the cosmological consequences of a continuous matter creation associated with the production of particles by the gravitational field acting on the quantum vacuum. To illustrate this, three phenomenological models are considered. An equivalent scalar field description is presented for each models. The effects on the cosmic microwave background power spectrum are analyzed for the first time in the context of adiabatic matter creation cosmology. Further, we introduce a model independent treatment, $Om$, which depends only on the Hubble expansion rate and the cosmological redshift to distinguish any cosmological model from $Λ$CDM by providing a null test for the cosmological constant, meaning that, for any two redshifts $z_1$, $z_2$, $Om (z)$ is same, i.e. $Om (z_1)- Om (z_2)= 0$. Also, this diagnostic can differentiate between several cosmological models by indicating their quintessential/ phantom behavior without knowing the accurate value of the matter density, and the present value of the Hubble parameter. For our models, we find that particle production rate is inversely proportional to $Om$. Finally, the validity of the generalized second law of thermodynamics bounded by the apparent horizon has been examined.

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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