Phys. Rev. Lett. 101, 111101 (2008) [4 pages]Cosmological Perturbation Theory in Slow-Roll SpacetimesReceived 26 April 2008; published 11 September 2008 We present a gauge-invariant argument that a nonlocal measure of second-order metric and matter perturbations dominates that of linear fluctuations in its effect on the gravitational field in “slow-rolling” spacetimes. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.111101
DOI:
10.1103/PhysRevLett.101.111101
PACS:
98.80.Jk
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