Search: onr:"swepub:oai:DiVA.org:kth-276907" >
alpha '-cosmology :
alpha '-cosmology : solutions and stability analysis
-
- Bernardo, Heliudson (author)
- McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada.
-
- Franzmann, Guilherme (author)
- 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.
-
McGill Univ, Phys Dept, Montreal, PQ H3A 2T8, Canada Fysikum (creator_code:org_t)
- SPRINGER, 2020
- 2020
- English.
-
In: Journal of High Energy Physics (JHEP). - : SPRINGER. - 1126-6708 .- 1029-8479. ; :5
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- Cosmology of Theories beyond the SM
- String Duality
- Superstring Vacua
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database