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arXiv 2006.03092gr-qcastro-ph.COhep-ph
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连续自发定域模型中暴胀微扰的产生:二阶功率谱

Generation of inflationary perturbations in the continuous spontaneous localization model: The second order power spectrum

Gabriel Leon, Maria Pia Piccirilli

摘要:

宇宙暴胀,它描述了早期宇宙的加速膨胀,产生了关于宇宙微波背景(CMB)温度各向异性的最成功的预测。然而,原始微扰的确切起源及其量子到经典的转变仍然是一个悬而未决的问题。在宇宙学的背景下,连续自发局域化模型(CSL)可能被用来提供一个解决上述难题,考虑一个客观的减少暴胀波函数。在这项工作中,我们计算的原始功率谱在下一个领先的顺序在哈勃流函数的结果,从CSL模型应用到慢卷膨胀的半经典重力框架内。我们采用的方法被称为一致逼近与二阶展开的哈勃流函数。我们分析了CMB温度和原始功率谱中的一些特征,这些特征可以帮助区分标准预测和我们的方法。

英文摘要:

Cosmic inflation, which describes an accelerated expansion of the early Universe, yields the most successful predictions regarding temperature anisotropies in the cosmic microwave background (CMB). Nevertheless, the precise origin of the primordial perturbations and their quantum-to-classical transition is still an open issue. The continuous spontaneous localization model (CSL), in the cosmological context, might be used to provide a solution to the mentioned puzzles by considering an objective reduction of the inflaton wave function. In this work, we calculate the primordial power spectrum at the next leading order in the Hubble flow functions that results from applying the CSL model to slow roll inflation within the semiclassical gravity framework. We employ the method known as uniform approximation along with a second order expansion in the Hubble flow functions. We analyze some features in the CMB temperature and primordial power spectra that could help to distinguish between the standard prediction and our approach.

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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