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About

Paul Martini is a leading observational cosmologist whose work has been central to the design and scientific success of the Dark Energy Spectroscopic Instrument (DESI). His primary research focuses on dark energy, large-scale structure, and the baryon acoustic oscillation (BAO) technique for measuring the expansion history of the Universe. Martini made a foundational contribution to DESI’s technical infrastructure as the lead author on the 2022 paper describing the instrument’s robotic multiobject focal plane system—a groundbreaking assembly of 5,020 fiber positioners that autonomously retarget to micron precision every 10–20 minutes. This paper has garnered 175 citations, underscoring its importance to the field. He also co-authored the first detection of the BAO signal from early DESI data (2023, 37 citations), a milestone that validated the instrument’s ability to probe cosmic expansion. Beyond DESI, Martini has contributed to the instrument’s shutter and fiber illumination system. His work bridges precision engineering and fundamental cosmology, enabling transformative surveys that map millions of galaxies and advance our understanding of the Universe’s accelerating expansion.