ToK Warszawa meeting - Rough Notes Sun 18 Feb 2007

These are just rough notes - feel free to correct them, add links, etc.

David Langlois

exact non-linear approach to perturbations (continued) - ToK070216RoughNotes

Mukhanov - polarisation tensor approach vs Stokes parameters

polarisation tensors - vectors on sphere - $P_{ab}$ - see also WikipediaEn:Polarization

eigenvalue problem $P_b^a - \lambda p_b$ , $\lambda > 0$

follow this through recombination - WikipediaEn:Thomson_scattering - requires recombination duration to be

, otherwise no polarisation

requires quadrupole (at least anisotropy), so from beginning of recombination epoch

horizon scale at time of recombination

$P \propto \frac{\delta T}{T} \sigma^2 \propto 10^{-2} \frac{\delta T}{T}$

B=0 for scalar

polarisation from gravitational waves

BB correlation $\ll$ C_l (unpolarised)

Topic revision: r2 - 18 Feb 2007, BoudRoukema

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