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Cosmological probes of the early universe with Axions & Gravitational Waves
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Physics.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis uses theoretical studies, and numerical simulations to provide results of the experimental reach to detect the QCD axion as dark matter in a Non-standard cosmological background. Assuming that the QCD axion constitutes the full CDM abundance of the universe, this thesis elaborates on its potential detection from experimental setups for the mass window of the axion. The set of results that is obtained here are the relic CDM energy density of axions produced by the vacuum realignment mechanism and the CDM energy density of axions produced from the decay of a network of cosmic strings. This thesis provides results regarding the possibility to detect a primordial gravitational wave relic, which is possible within some favorable cosmological scenarios for the background.

Place, publisher, year, edition, pages
2019. , p. 60
Series
UPTEC F, ISSN 1401-5757 ; 19051
Keywords [en]
axions, early universe, dark matter, gravitational waves, modified cosmology, cosmic strings
Keywords [sv]
axion, tidigt universum, mörk materia, gravitationsvågor, modifierad kosmologi, kosmiska strängar
National Category
Astronomy, Astrophysics and Cosmology Other Physics Topics
Identifiers
URN: urn:nbn:se:uu:diva-394014OAI: oai:DiVA.org:uu-394014DiVA, id: diva2:1356613
Educational program
Master Programme in Engineering Physics
Supervisors
Examiners
Available from: 2019-10-03 Created: 2019-10-01 Last updated: 2019-10-03Bibliographically approved

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Astronomy, Astrophysics and CosmologyOther Physics Topics

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • de-DE
  • en-GB
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  • nn-NO
  • nn-NB
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Output format
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