The Thomson optical depth from reionization is a limiting factor in measuring the amplitude
of primordial fluctuations, and hence in measuring physics that affects the low-redshift …

We study the possibility of measuring the optical depth at reionization τ without relying on
large-scale cosmic microwave background (CMB) polarization. Our analysis is driven by the …

The polarization of the cosmic microwave background (CMB) is encoded with exactly the
same cosmic information as the CMB's temperature anisotropy. However, polarization has …

The cosmic microwave background (CMB) lensing power spectrum is a powerful probe of
the late-time Universe, encoding valuable information about cosmological parameters such …

We analyze simulated maps of the Cosmology Large Angular Scale Surveyor (CLASS)
experiment and recover a nearly cosmic variance limited estimate of the reionization optical …

Planned cosmic microwave background (CMB) experiments will improve what we know
about neutrino physics, inflation, and dark energy. The low level of noise, together with …

Precise reconstruction of the cosmic microwave background lensing potential can be
achieved with deep polarization surveys by iteratively removing lensing-induced B modes …

Following Kamionkowski (2008), a quadratic estimator of the rotation of the plane of
polarization of the cosmic microwave background (CMB) is constructed. This statistic can …

Inhomogeneous reionization gives rise to angular fluctuations in the Cosmic Microwave
Background (CMB) optical depth tau (n) to the last scattering surface, correlating different …

We represent the reionization history of the universe as a free function in redshift and study
the potential for its extraction from cosmic microwave background (CMB) polarization …