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About

Martin Landriau is a key architect of the hardware and analysis pipelines behind the Dark Energy Spectroscopic Instrument (DESI), a Stage-IV ground-based experiment designed to create the largest 3D map of the universe and unravel the mystery of dark energy. His primary contributions lie in the design, calibration, and performance characterization of DESI’s revolutionary robotic focal plane system, which employs 5,020 fiber positioners to automatically retarget celestial objects every 10–20 minutes with micron-level precision. Landriau’s work on the Robotic Multiobject Focal Plane System (175 citations) and the overall fiber system (57 citations) has been foundational to DESI’s success. He also led the first detection of the baryon acoustic oscillation (BAO) signal from early DESI data (37 citations), a milestone in measuring cosmic distances. To ensure unbiased clustering measurements, Landriau developed novel methods for correcting fiber assignment incompleteness—a critical systematic effect—producing alternate realizations that enable robust cosmological analyses (25 and 20 citations). His meticulous astrometric calibration work (4 citations) further ensures the instrument’s precision. Through these contributions, Landriau has directly enabled DESI’s mission to measure 40 million galaxies and quasars, cementing his role as a leader in experimental cosmology.