On the Superstrings-Induced Four-Dimensional Gravity and Its Applications to Cosmology
Joint Authors
Iihoshi, Masao
Ketov, Sergei V.
Source
Advances in High Energy Physics
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-27, 27 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2009-01-22
Country of Publication
Egypt
No. of Pages
27
Main Subjects
Abstract EN
We review the status of the fourth-order (quartic in the spacetime curvature) terms induced by superstrings/M-theory (compactified on a warped torus) in the leading order with respect to the Regge slope parameter, and study their (nonperturbative) impact on the evolution of the Hubble scale in the context of the four-dimensional FRW cosmology.
After taking into account the quantum ambiguities in the definition of the off-shell superstring effective action, we propose the generalized Friedmann equations, find the existence of their (de Sitter) exact inflationary solutions without a spacetime singularity, and constrain the ambiguities by demanding stability and the scale factor duality invariance of our solutions.
The most naive (Bel-Robinson tensor squared) quartic terms are ruled out, thus giving the evidence for the necessity of extra quartic (Ricci tensor-dependent) terms in the off-shell gravitational effective action for superstrings.
Our methods are generalizable to the higher orders in the spacetime curvature.
American Psychological Association (APA)
Iihoshi, Masao& Ketov, Sergei V.. 2009. On the Superstrings-Induced Four-Dimensional Gravity and Its Applications to Cosmology. Advances in High Energy Physics،Vol. 2008, no. 2008, pp.1-27.
https://search.emarefa.net/detail/BIM-478343
Modern Language Association (MLA)
Iihoshi, Masao& Ketov, Sergei V.. On the Superstrings-Induced Four-Dimensional Gravity and Its Applications to Cosmology. Advances in High Energy Physics No. 2008 (2008), pp.1-27.
https://search.emarefa.net/detail/BIM-478343
American Medical Association (AMA)
Iihoshi, Masao& Ketov, Sergei V.. On the Superstrings-Induced Four-Dimensional Gravity and Its Applications to Cosmology. Advances in High Energy Physics. 2009. Vol. 2008, no. 2008, pp.1-27.
https://search.emarefa.net/detail/BIM-478343
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-478343