Computing Microwave Background Polarization Power Spectra from Cosmic Birefringence

Abstract

We present a new publicly available code, $\texttt{class_rot}$, which modifies $\text{class}$ to enable fast non-perturbative calculation of cosmic microwave background polarization power spectra due to both isotropic and anisotropic polarization rotation from cosmic birefringence. Cosmic birefringence can arise from new parity-violating physics such as axion dark matter with a Chern-Simons coupling to photons or Faraday rotation due to a primordial magnetic field. Constraints on these effects can be obtained by comparing measurements to precise numerical calculations of the polarization power spectra. We describe the implementation of $\texttt{class_rot}$ in terms of both mathematical formalism and coding architecture. We also provide usage examples and demonstrate the accuracy of the code by comparing with simulations.

arXiv comment6 pages, 2 figures, submitted to PRD

References in corpus (28)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Lorentz-Violating Extension of the Standard Model
• CPT Violation and the Standard Model
• The Simons Observatory: Science goals and forecasts
• Quintessence and the Rest of the World
• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
• Cosmological Signature of New Parity-Violating Interactions
• The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz
• Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
• Delensing CMB Polarization with External Datasets
• Lensed CMB power spectra from all-sky correlation functions
• Rotation of Linear Polarization Plane and Circular Polarization from Cosmological Pseudoscalar Fields
• Self-Calibration of CMB Polarization Experiments
• Pseudoscalar perturbations and polarization of the cosmic microwave background
• Cosmological CPT violating effect on CMB polarization
• De-Rotation of the Cosmic Microwave Background Polarization: Full-Sky Formalism
• The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence
• Searching for Anisotropic Cosmic Birefringence with Polarization Data from SPTpol
• Self-Calibration of BICEP1 Three-Year Data and Constraints on Astrophysical Polarization Rotation
• Cross-Correlation of Cosmological Birefringence with CMB Temperature
• BICEP2 / Keck Array IX: New Bounds on Anisotropies of CMB Polarization Rotation and Implications for Axion-Like Particles and Primordial Magnetic Fields
• Future CMB constraints on cosmic birefringence and implications for fundamental physics
• Cosmic Birefringence Test of the Hubble Tension
• Probing Primordial Magnetism with Off-Diagonal Correlators of CMB Polarization
• New Constraints on Anisotropic Rotation of CMB Polarization
• Testing parity-violating physics from cosmic rotation power reconstruction
• The Cosmic Microwave Background And Pseudo-Nambu-Goldstone Bosons: Searching For Lorentz Violations In The Cosmos
• The effects on CMB power spectra and bispectra from the polarization rotation and its correlations with temperature and E-polarization

Cited by in corpus (6)

• Is cosmic birefringence due to dark energy or dark matter? A tomographic approach
• Redshift evolution of cosmic birefringence in CMB anisotropies
• LiteBIRD Science Goals and Forecasts: Primordial Magnetic Fields
• Impact of Anisotropic Birefringence on Measuring Cosmic Microwave Background Lensing
• Exact CMB B-mode power spectrum from anisotropic cosmic birefringence
• BICEP/Keck XXI: Constraints on Early-Universe Parity Violation from Multipole-Dependent Birefringence