Axion instanton for higher-derivative quantum gravity

Details Axion instanton for higher-derivative quantum gravity Axion instanton for higher-derivative quantum gravity

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phlb..233...85g&link_type=abstract

Physics Letters B, Volume 233, Issue 1-2, p. 85-88.

Physics

15

Scientific paper

A new euclidean solution is obtained for an axion coupled to gravity
with a curvature-squared term. This instanton describes the nucleation
of a baby universe. It is shown that the effect of the
R2-term is to suppress the interactions of baby universes.

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