Lensing signals from Spin-2 perturbations
arXiv:1510.01566 · doi:10.1088/1475-7516/2016/01/024
Abstract
We compute the angular power spectra of the E-type and B-type lensing potentials for gravitational waves from inflation and for tensor perturbations induced by scalar perturbations. We derive the tensor-lensed CMB power spectra for both cases. We also apply our formalism to determine the linear lensing potential for a Bianchi I spacetime with small anisotropy.
19 pages, 5 figures; v2: discussions about non-linear contributions and quadrupole regularization extended, minor typos corrected, references added, matches published version