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arXiv 0907.5542hep-thastro-ph.COgr-qchep-ph
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全息宇宙学

Holography for Cosmology

Paul McFadden, Kostas Skenderis

摘要:

我们提出了一个四维单标量暴胀宇宙的全息描述,并展示了宇宙学观测,如原始功率谱,是如何编码在三维QFT的关联函数。全息描述正确地再现了标准的暴胀预言的极限,在那里波动的微扰量子化是合理的。在相反的限制,其中重力是强耦合在早期,我们提出了一个全息描述的微扰大N QFT。启动全息唯象的方法,我们表明,模型只包含两个参数,N和一个维度的耦合常数,能够满足目前的观测约束。

英文摘要:

We propose a holographic description of four-dimensional single-scalar inflationary universes, and show how cosmological observables, such as the primordial power spectrum, are encoded in the correlation functions of a three-dimensional QFT. The holographic description correctly reproduces standard inflationary predictions in the limit where a perturbative quantization of fluctuations is justified. In the opposite limit, wherein gravity is strongly coupled at early times, we propose a holographic description in terms of perturbative large N QFT. Initiating a holographic phenomenological approach, we show that models containing only two parameters, N and a dimensionful coupling constant, are capable of satisfying the current observational constraints.

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