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Phys. Rev. Lett. 101, 111101 (2008) [4 pages]

Cosmological Perturbation Theory in Slow-Roll Spacetimes

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B. Losic1,* and W. G. Unruh2,3,†
1Department of Physics, P-412, Avadh Bhatia Physics Laboratory, University of Alberta, Edmonton, Alberta T6G 2J1, Canada
2Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road Vancouver, BC V6T 1Z1, Canada
3Canadian Institute for Advanced Research, Cosmology and Gravitation Program

Received 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

*blosic@phys.ualberta.ca

unruh@physics.ubc.ca