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alpha '-cosmology :
alpha '-cosmology : solutions and stability analysis
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- Bernardo, Heliudson (författare)
- McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada.
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- Franzmann, Guilherme (författare)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Nordiska institutet för teoretisk fysik (Nordita),Nordita SU;Stockholm Univ, Oskar Klein Ctr, Dept Phys, SE-10691 Stockholm, Sweden.
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McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada Fysikum (creator_code:org_t)
- SPRINGER, 2020
- 2020
- Engelska.
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Ingår i: Journal of High Energy Physics (JHEP). - : SPRINGER. - 1126-6708 .- 1029-8479. ; :5
- Relaterad länk:
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https://doi.org/10.1...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We review O(d, d) Covariant String Cosmology to all orders in alpha ' in the presence of matter and study its solutions. We show that the perturbative analysis for a constant dilaton in the absence of a dilatonic charge does not lead to a time-independet equation of state. Meanwhile, the non-perturbative equations of motion allow de Sitter solutions in the String frame parametrized by the equation of state and the dilatonic charge. Among this set of solutions, we show that a cosmological constant equation of state implies a de Sitter solution both in String and Einstein frames while a winding equation of state implies a de Sitter solution in the former and a static phase in the latter. We also consider the stability of these solutions under homogeneous linear perturbations and show that they are not unstable, therefore defining viable cosmological scenarios.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- Cosmology of Theories beyond the SM
- String Duality
- Superstring Vacua
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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