Optimal polarisation equations in FLRW universes
arXiv:1305.3261 · doi:10.1088/1475-7516/2013/10/002
Abstract
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.
27 pages, prepared for submission to JCAP. Matches published version