Mathematics – Logic
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995anphy.238....1t&link_type=abstract
Ann. Phys. (N.Y.), Vol. 238, No. 1, p. 1 - 82
Mathematics
Logic
88
Quantum Gravity: Cosmology
Scientific paper
The authors explore "quantum cosmological gravity", or quantum general relativity with a nonzero cosmological constant. It is explained why and how QCG can be used reliably in the far infrared, despite the absence of renormalizability. They show that loop corrections to positive Λ QCG mediate powerful infrared effects for two reasons: first, the theory allows massless gravitons to self-interact via a coupling of dimension three; second, the inflationary redshift of the classical background progressively increases the population of soft gravitons. One consequence is that QCG must eventually dominate the physics of inflation with respect to any phenomenologically confirmed theory, no matter how much stronger the nongravitational couplings may seem. Another consequence is that the graviton's on-shell self-energy is negative and infrared divergent at one loop, thereby inducing a negative infrared divergence in the two-loop vacuum energy. The authors analyze these effects in the context of causal evolution from an initial patch of one Hubble volume which begins inflation at finite times in one of the homogeneous and isotropic Fock states of free QCG.
Tsamis Nicholas C.
Woodard Richard P.
No associations
LandOfFree
Strong infrared effects in quantum gravity. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strong infrared effects in quantum gravity., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strong infrared effects in quantum gravity. will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1630003