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  Quantum Inhomogeneities in String Cosmology

Buonanno, A., Meissner, K., Ungarelli, C., & Veneziano, G. (1998). Quantum Inhomogeneities in String Cosmology. Journal of high energy physics: JHEP, 1998(01): 04. doi:10.1088/1126-6708/1998/01/004.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BDDD-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-BDDE-F
Genre: Journal Article

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hep-th_9710188.pdf (Preprint), 334KB
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 Creators:
Buonanno, A.1, 2, Author              
Meissner, K., Author
Ungarelli, C., Author
Veneziano, G., Author
Affiliations:
1Institut des Hautes Etudes Scienti ques, escidoc:persistent22              
2Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, escidoc:1933290              

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Free keywords: High Energy Physics - Theory, hep-th,General Relativity and Quantum Cosmology, gr-qc
 Abstract: Within two specific string cosmology scenarios --differing in the way the pre- and post-big bang phases are joined-- we compute the size and spectral slope of various types of cosmologically amplified quantum fluctuations that arise in generic compactifications of heterotic string theory. By further imposing that these perturbations become the dominant source of energy at the onset of the radiation era, we obtain physical bounds on the background's moduli, and discuss the conditions under which both a (quasi-) scale-invariant spectrum of axionic perturbations and sufficiently large seeds for the galactic magnetic fields are generated. We also point out a potential problem with achieving the exit to the radiation era when the string coupling is near its present value.

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 Dates: 1997-10-241998
 Publication Status: Published in print
 Pages: 30 pages, RevteX, epsfig, 5 figures
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: arXiv: hep-th/9710188
DOI: 10.1088/1126-6708/1998/01/004
URI: http://arxiv.org/abs/hep-th/9710188
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Title: Journal of high energy physics : JHEP
Source Genre: Journal
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Publ. Info: Bologna, Italy : Società italiana di fisica
Pages: - Volume / Issue: 1998 (01) Sequence Number: 04 Start / End Page: - Identifier: ISSN: 1126-6708
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/111021927548002