Jonathan Schiff

Research

My primary focus is in understanding the recombination in the early universe, which is the process by which neutral hydrogen was formed allowing for the earliest light, known as the Cosmic Microwave Background (CMB) to be released and reach our telescopes today. A better understanding of recombination is essential for utilizing the CMB as a probe of the expansion rate of the universe, and provides a potential resolution to the Hubble tension between early and late universe measurements of the expansion rate. I am also interested in numerical relativity and its applications in cosmology.