Cosmology with nonminimal derivative couplings

• Verfasst von: Amendola, Luca [VerfasserIn]
• Titel: Cosmology with nonminimal derivative couplings
• Verf.angabe: Luca Amendola
• Umfang: 8 S.
• Fussnoten: Gesehen am 21.11.2017
• Titel Quelle: Enthalten in: Physics letters / B
• Jahr Quelle: 1993
• Band/Heft Quelle: 301(1993), 2-3, S. 175-182
• ISSN Quelle: 1873-2445
• DOI: doi:10.1016/0370-2693(93)90685-B
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565554140

Abstract

We study a theory which generalizes the nonminimal coupling of matter to gravity by including derivative couplings. This leads to several interesting new dynamical phenomena in cosmology. In particular, the range of parameters in which inflationary attractors exist is greatly expanded. We also numerically integrate the field equations and draw the phase space of the model in second order approximation. The model introduced here may display different inflationary epochs, generating a non-scale-invariant fluctuation spectrum without the need of two or more fields. Finally, we comment on the bubble spectrum arising during a first-order phase transition occuring in our model.