Superhorizon perturbations and preheating.

Malik, Karim A, Wands, David, Lyth, David H and Liddle, Andrew R (2001) Superhorizon perturbations and preheating. In: International Conference on Cosmology and Particle Physics (CAPP 2000), JUL 17-28, 2000., VERBIER, SWITZERLAND..

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We discuss the evolution of linear perturbations about a Friedmann-Robertson Walker background metric, using only the local conservation of energy-momentum. We show that on sufficiently large scales the curvature perturbation on spatial hypersurfaces of uniform-density is constant when the non-adiabatic pressure perturbation is negligible. We clarify the conditions under which super-horizon curvature perturbations may vary, using preheating as an example.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Published in: Cosmology and Particle Physics: CAPP 2000. AIP Conference Proceedings, Volume 555, pp. 289-292 (2001).
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User: Andrew Liddle
Date Deposited: 06 Feb 2012 20:17
Last Modified: 29 Mar 2012 11:45
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