dc.contributor.author | Catelin-Jullien, T. | en |
dc.contributor.author | Kounnas, Costas | en |
dc.contributor.author | Partouche, Hervé | en |
dc.contributor.author | Toumbas, Nicolaos K. | en |
dc.creator | Catelin-Jullien, T. | en |
dc.creator | Kounnas, Costas | en |
dc.creator | Partouche, Hervé | en |
dc.creator | Toumbas, Nicolaos K. | en |
dc.date.accessioned | 2019-12-02T15:28:55Z | |
dc.date.available | 2019-12-02T15:28:55Z | |
dc.date.issued | 2008 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/58570 | |
dc.description.abstract | We consider classical superstring theories on flat four-dimensional space-times, and where N = 4 or N = 2 supersymmetry is spontaneously broken. We obtain the thermal and quantum corrections at the string one-loop level and show that the back-reaction on the space-time metric induces a cosmological evolution. We concentrate on heterotic string models obtained by compactification on a T6 torus and on T6 / Z2 orbifolds. The temperature T and the supersymmetry breaking scale M are generated via the Scherk-Schwarz mechanism on the Euclidean time cycle and on an internal spatial cycle respectively. The effective field theory corresponds to a no-scale supergravity, where the corresponding no-scale modulus controls the SUSY-breaking scale. The classical flatness of this modulus is lifted by an effective thermal potential, given by the free energy. The gravitational field equations admit solutions where M, T and the inverse scale factor 1 / a of the universe remain proportional. In particular the ratio M / T is fixed during time evolution. The induced cosmology is governed by a Friedmann-Hubble equation involving an effective radiation term ∼ 1 / a4 and an effective curvature term ∼ 1 / a2, whose coefficients are functions of the complex structure ratio M / T. © 2008 Elsevier B.V. All rights reserved. | en |
dc.source | Nuclear Physics B | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-40849120717&doi=10.1016%2fj.nuclphysb.2007.12.030&partnerID=40&md5=f1395196d561b84c3511e5239f38e5f1 | |
dc.subject | Finite temperature | en |
dc.subject | Heterotic string | en |
dc.subject | Quantum cosmology | en |
dc.title | Thermal/quantum effects and induced superstring cosmologies | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1016/j.nuclphysb.2007.12.030 | |
dc.description.volume | 797 | |
dc.description.issue | 1-2 | |
dc.description.startingpage | 137 | |
dc.description.endingpage | 178 | |
dc.author.faculty | Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Φυσικής / Department of Physics | |
dc.type.uhtype | Article | en |
dc.source.abbreviation | Nucl.Phys.B | en |
dc.contributor.orcid | Toumbas, Nicolaos K. [0000-0001-8879-7330] | |
dc.gnosis.orcid | 0000-0001-8879-7330 | |