Lensing Simulation and Power Spectrum Estimation for High Resolution CMB Polarization Maps

TL;DR

This paper introduces efficient algorithms for simulating CMB lensing and estimating polarization power spectra, including a pure B-mode estimator to address E to B leakage, validated with realistic simulations.

Contribution

The paper develops new algorithms for CMB lensing simulation and power spectrum estimation, including a pure B-mode estimator to reduce E to B leakage in partial sky observations.

Findings

Estimators are unbiased and match projected errors.

Algorithms work effectively with realistic noise and weights.

Validated with simulations of small sky patches.

Abstract

We present efficient algorithms for CMB lensing simulation and power spectrum es- timation for flat-sky CMB polarization maps. We build a pure B-mode estimator to remedy E to B leakage due to partial sky coverage. We show that our estimators are unbiased, and consistent with the projected errors. We demonstrate our algorithm using simulated observations of small sky patches with realistic noise and weights for upcoming CMB polarization experiments.