Exploring cosmic origins with CORE: Inflation
نویسندگان
چکیده
منابع مشابه
Cosmic Inflation *
I review the current status of the theory of Cosmic Inflation. My discussion covers the motivation and implementation of the idea, as well as an analysis of recent successes and open questions. There is a special discussion of the physics of “cosmic coherence” in the primordial perturbations. The issue of coherence is at the heart of much of the success inflation theory has achieved at the hand...
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We perform a multiparameter likelihood analysis to compare measurements of the cosmic microwave background (CMB) power spectra with predictions from models involving cosmic strings. Adding strings to the standard case of a primordial spectrum with power-law tilt ns, we find a 2sigma detection of strings: f10=0.11+/-0.05, where f10 is the fractional contribution made by strings in the temperatur...
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In the context of inflationary models with a pre-inflationary stage, in which the Einstein equations are obeyed, the weak energy condition is satisfied, and spacetime topology is trivial, we argue that homogeneity on super-Hubble scales must be assumed as an initial condition. Models in which inflation arises from field dynamics in a Friedman-Robertson-Walker background fall into this class but...
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In innation cosmologies, cosmic structure develops through the gravitational instability of the inevitable quantum noise in primordial scalar elds. I show how the acceleration of the universe deenes the shape of the primordial spectrum of gravitational metric and scalar eld uctuations. I assess how we can determine the shape and overall amplitude over the ve decades or so of spatial wavelengths...
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This paper investigates the forecasting accuracy of the trimmed mean inflation rate of the Personal Consumption Expenditure (PCE) deflator. Earlier works have examined the forecasting ability of limited-influence estimators (trimmed means and the weighted median) of the Consumer Price Index but none have compared the weighted median and trimmed mean of the PCE. Also addressed is the systematic ...
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ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2018
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2018/04/016