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ToK Warszawa meeting - Rough Notes Thu 16 Feb 2007
Langlois - Non-linear cosmological perturbations
zeta
Evolution equation
covariant approach
ToK
Warszawa meeting - Rough Notes Thu 16 Feb 2007
These are just rough notes - feel free to correct them, add links, etc.
Langlois - Non-linear cosmological perturbations
David Langlois + Vernizzi
AstroPh:0503416
Evolution of non-linear cosmological perturbations
AstroPh:0509078
Conserved non-linear quantities in cosmology
zeta
contours of constant density are not equal to contours of constant time
Evolution equation
linear case:
perfect fluid
large scales -
- adiabatic
conserved
covariant approach
generalised H parameter circle{H} = \Del_a u^a
Hawking; Ellis & Bruni
h_a^b \Del_a \rho
= 0 FLRW \not= 0 perturbed FLRW
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