Gravitational waves and the (quantum) nature of the primordial seed

被引：2

作者：

Porto, Rafael A. ^{[1
,2
]}

机构：

[1] Inst Adv Study, Sch Nat Sci, Princeton, NJ 08540 USA

[2] Deutsch Elektronen Synchrotron DESY, Theory Grp, D-22603 Hamburg, Germany

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2014年 / 23卷 / 12期

关键词：

Gravitational waves; cosmology; inflation; CONSTRAINTS;

D O I：

10.1142/S0218271814410053

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

At first glance, the (indirect) measurement of primordial tensor modes by the BICEP2 Collaboration supports an inflationary paradigm for early universe cosmology together with quantum vacuum fluctuations (aka gravitons) as the origin of the spectrum. In this paper, we argue the observed signal may instead be a signature of semiclassical sources of perturbations during inflation. In this scenario, despite a large tensor-to-scalar ratio r similar or equal to 0.2, it may be possible to write an effective field theory (EFT) of a rolling scalar field without super-Planckian excursions. If the results from BICEP2 withstand further scrutiny, measurements of primordial non-Gaussianity with large scale structure surveys, and direct detection of gravitational waves (GWs) with the new generation of observatories, will be of paramount importance to elucidate the (quantum) origin of structure in the universe.

引用

页数：8

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