Tomas Janssen and Tomislav Prokopec JCAP05(2007)010 doi:10.1088/1475-7516/2007/05/010
Tomas Janssen and Tomislav Prokopec
Show affiliationsWe consider quantum effects of a massive antisymmetric tensor field on the dynamics of de Sitter space–time. Our starting point is the most general, stable, linearized Lagrangian arising in non-symmetric gravitational theories, where part of the antisymmetric field mass is generated by the cosmological term. We construct a renormalization group (RG) improved effective action by integrating out one-loop vacuum fluctuations of the antisymmetric tensor field and show that, in the limit when the RG scale goes to zero, the Hubble parameter—and thus the effective cosmological constant—relaxes rapidly to zero. We thus conclude that quantum loop effects in de Sitter space can dramatically change the infrared sector of the on-shell gravity, making the expansion rate insensitive to the original (bare) cosmological constant.
E-print Number: gr-qc/0703050
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Issue 05 (May 2007)
Received 11 April 2007, accepted for publication 19 April 2007
Published 14 May 2007
Tomas Janssen and Tomislav Prokopec JCAP05(2007)010
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