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Probing inflation with CMB polarization
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posted on 2023-06-08, 10:04 authored by Andrew LiddleWe summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes of the physics of inflation. We focus on the prospects for using CMB measurements to differentiate various inflationary mechanisms. In particular, a detection of primordial B-mode polarization would demonstrate that inflation occurred at a very high energy scale, and that the inflaton traversed a super-Planckian distance in field space. We explain how such a detection or constraint would illuminate aspects of physics at the Planck scale. Moreover, CMB measurements can constrain the scale-dependence and non-Gaussianity of the primordial fluctuations and limit the possibility of a significant isocurvature contribution. Each such limit provides crucial information on the underlying inflationary dynamics. Finally, we quantify these considerations by presenting forecasts for the sensitivities of a future satellite experiment to the inflationary parameters.
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Publication status
- Published
ISSN
0094243XExternal DOI
Volume
1141Pages
110.0Presentation Type
- paper
Event name
CMB Polarization Workshop: Theory And ForegroundsEvent location
Fermilab in Batavia (IL)Event type
conferenceEvent date
23–26 June 2008ISBN
978-073540678-0Department affiliated with
- Physics and Astronomy Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-02-06Usage metrics
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