About

Cosmology from weak signals in the microwave sky.

I work on the faint signals hidden in CMB polarization maps, building analysis methods that help turn precision sky measurements into tests of fundamental physics.

I am a postdoctoral fellow at the University of California, San Diego, working on precision cosmology with the Cosmic Microwave Background. My research develops statistical and computational methods for extracting weak polarization signals from survey data, with emphasis on gravitational lensing, B-mode polarization, delensing, and cosmic birefringence.

A central aim of my work is to connect theoretical signatures of fundamental physics with the practical realities of modern CMB observations: foregrounds, instrumental systematics, map-level simulations, likelihood construction, and cross-survey consistency. I contribute to analyses and forecasts for experiments including POLARBEAR, Simons Array, Simons Observatory, LiteBIRD, and CMB-S4.

Recent Paper

Latest publication

Latest Work

Differential Polarization Calibration: A Consistency Test for Cosmic Birefringence

The cosmic microwave background birefringence angle ββ is exactly degenerate with a common instrumental polarization-angle offset. The Minami--Komatsu(MK) likelihood separates these quantities using Galactic foreground polarization, so its inferred detector angles merit a diagnostic that does not reuse the foreground-EBEB model.

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Paper figure
Figure 1: Pairwise differential polarization angles for the 28 Planck detector-set pair. Blue circles show the foreground-assisted MK likelihood, while orange squares show the birefringence-blind relative estimator. The orange error bars represent uncertainties on the directly estimated pairwise differences Δαij=αi−αj\Delta\alpha_{ij}=\alpha_{i}-\alpha_{j} , whereas the blue error bars represent the 1σ1\sigma likelihood uncertainties of the individual map angles αi\alpha_{i} from the MK analysis. The common rotation β\beta is absent from both reconstructions.