Improvement versus stability in gravity-scalar coupling

Details Improvement versus stability in gravity-scalar coupling Improvement versus stability in gravity-scalar coupling

Jan 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phlb..134..419d&link_type=abstract

Physics Letters B, Volume 134, Issue 6, p. 419-421.

Physics

30

Scientific paper

Conformal invariance requires a massless scalar field to couple nonminimally with gravity; as a result its stress tensor is no longer positive. Improvement is nevertheless shown to be compatible with positive energy for the total system, provided the scalar field's amplitude does not exceed the (inverse) Einstein constant. The system's properties in presence of cosmological, mass and self-interaction terms are also treated.

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