期刊
PHYSICS LETTERS B
卷 706, 期 2-3, 页码 111-115出版社
ELSEVIER
DOI: 10.1016/j.physletb.2011.11.009
关键词
-
资金
- Stephen Hawking Advanced Fellowship
Experimentally distinguishing different primordial universe paradigms that lead to the Big Bang model is an outstanding challenge in modern cosmology and astrophysics. We show that a generic type of signals that exist in primordial universe models can be used for such purpose. These signals are induced by tiny oscillations of massive fields and manifest as features in primordial density perturbations. They are capable of recording the time-dependence of the scale factor of the primordial universe, and therefore provide direct evidence for specific paradigm. These signals present special opportunities and challenges for experiments and data analyses. (C) 2011 Elsevier B.V. All rights reserved.
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