1305.3261 (Thomas Tram et al.)

Optimal polarisation equations in FLRW universes    [PDF]

Thomas Tram, Julien Lesgourgues

This paper presents the linearised Boltzmann equation for photons for scalar, vector and tensor perturbations in flat, open and closed FLRW cosmologies. We show that E- and B-mode polarisation for all types can be computed using only a single hierarchy. This was previously shown explicitly for tensor modes in flat cosmologies but not for vectors, and not for non-flat cosmologies.

View original: http://arxiv.org/abs/1305.3261