Mathematics – Logic
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phrvd..42.2595p&link_type=abstract
Physical Review D (Particles and Fields), Volume 42, Issue 8, 15 October 1990, pp.2595-2600
Mathematics
Logic
16
Scientific paper
Cosmological solutions of field equations derived from a ten-dimensional (10D) action containing higher-derivative terms in the Gauss-Bonnet combination have been studied. An attempt has been made to construct a scenario which includes a spontaneous compactification and an inflationary epoch followed by a four-dimensional radiation-dominated stage. It is noted that one can have a realistic scenario, provided there is an inflationary stage of the early 10D universe. A mechanism is suggested which makes the 4D cosmological constant small. The action considered is different from the superstring-corrected action. The study reveals a rich structure of the theory due to the presence of Gauss-Bonnet terms, although one gets back the usual Einstein equation in 4D at a large time.
Mukherjee Soma
Paul Bikash Chandra
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