Comments on cosmological string solutions

Details Comments on cosmological string solutions Comments on cosmological string solutions

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..257..278a&link_type=abstract

Physics Letters B, Volume 257, Issue 3-4, p. 278-284.

Physics

76

Scientific paper

We comment on some physical and technical aspects of our linear-dilaton string solutions. We explain why the corresponding cosmological epoch has finite duration due to tachyonic instabilities present even in heterotic and type-II strings, argue that the size of the universe varies at a rate depending on the choice of relevant physical units, and briefly speculate whether such epochs replace inflation. Treating formally the screening prescription previously used to define d > 25 amplitudes as insertions of a tachy-on background, we derive a renormalized coupling constant, which exhibits a curious zero for one particular duration of the linear dilaton epoch.
Supported in part by DOE grant DE-AS05-81ER40039.

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