Cosmological Perturbations from Non-Equilibrium Quantum Fields
Cosmological Perturbations from Non-Equilibrium Quantum Fields
Cosmological Perturbations from Non-Equilibrium Quantum Fields
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Lattice Calculation<br />
Solve field + Friedmann eqs<br />
numerically on lattice<br />
Initial conditions<br />
χ(x) = χ 0 + δχ(x):<br />
δχ(x): subhorizon quantum<br />
fluctuations<br />
χ 0 : mean value over horizon<br />
Find curvature perturbation as<br />
ζ(χ 0 ) = δ ln a(χ 0 )| ρ=ρ∗<br />
Function of χ 0 , not x<br />
χ<br />
χ 0<br />
δχ<br />
L<br />
x<br />
Arttu Rajantie<br />
<strong>Cosmological</strong> <strong>Perturbations</strong> <strong>from</strong> <strong>Non</strong>-<strong>Equilibrium</strong> <strong>Quantum</strong> <strong>Fields</strong> – SEWM 2012
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