GENERALIZED 6TH-ORDER GRAVITY AND INFLATION

Authors
AMENDOLA L MAYER AB CAPOZZIELLO S GOTTLOBER S MULLER V OCCHIONERO F SCHMIDT HJ
Citation
L. Amendola et al., GENERALIZED 6TH-ORDER GRAVITY AND INFLATION, Classical and quantum gravity, 10(5), 1993, pp. 43-47
Citations number
14
Categorie Soggetti
Physics
Journal title
Classical and quantum gravity → ACNP
ISSN journal
02649381
Volume
10
Issue
5
Year of publication
1993
Pages
43 - 47
Database
ISI
SICI code
0264-9381(1993)10:5<43:G6GAI>2.0.ZU;2-A
Abstract
We consider sixth-order theories of gravity with Lagrangians containin g the term R(N) square R, where N > 1 is an integer. A conformal trans formation gives a picture with two scalar fields in Einstein's theory. We find de Sitter and power law inflationary solutions. However, the theory has an unstable weak-field behaviour, because the linearized fi eld equation is of lower order than the non-linear one.