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Atick-Witten Hagedorn conjecture, near scale-invariant matter and blue-tilted gravity power spectrum
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2014 (English)In: Journal of High Energy Physics (JHEP), ISSN 1029-8479, E-ISSN 1126-6708, no 8, 116- p.Article in journal (Refereed) Published
Abstract [en]

We will provide an interesting new mechanism to generate almost scale invariant seed density perturbations with a red spectrum, while keeping the gravitational wave spectrum blue-tilted in a stringy thermal contracting phase at temperatures beyond the Hagedorn temperature. This phase is often referred to as the Hagedorn phase where the free energy has been conjectured by Atick and Witten to grow more slowly than ordinary radiation. The primordial fluctuations are created by the statistical thermal fluctuations determined by the partition function, rather than quantum vacuum driven fluid dynamical fluctuations. Our mechanism assumes a non-singular bounce.

Place, publisher, year, edition, pages
2014. no 8, 116- p.
Keyword [en]
Cosmology of Theories beyond the SM, String Field Theory
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-107806DOI: 10.1007/JHEP08(2014)116ISI: 000341002400002OAI: diva2:752595


Available from: 2014-10-05 Created: 2014-09-29 Last updated: 2014-10-05Bibliographically approved

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