Technique - (4) Precision laser interferometry and thermal-noise-limited optics for GW detectors

Type: Experimental

Description: Development of ultra-low-noise laser sources, optical coatings, and interferometric readout for gravitational-wave detector sensitivity.

Department(s)/lab(s): Applied Physics | Byer Group @ Stanford
Summary:

Byer's long-running program in nonlinear optics and laser physics has produced key technologies for precision measurement, including low-noise laser sources, optical materials, and interferometric techniques that underpin gravitational-wave detectors and frequency metrology.

Department(s)/lab(s): Physics | MIT LIGO Laboratory @ MIT
Summary:

PREFERRED. Evans leads work on frequency-dependent squeezed-light injection and low-thermal-noise optics that has pushed Advanced LIGO below the standard quantum limit across its full detection band, and he leads the US design effort for the next-generation Cosmic Explorer gravitational-wave observatory. This is squarely quantum-enhanced sensing at a fundamental-physics facility scale rather than a device-fabrication program.

Department(s)/lab(s): Astronomy and Astrophysics | Hogan Group @ UChicago
Summary:

Hogan proposed that the holographic principle implies a fundamental, universal quantum uncertainty ('holographic noise') in the transverse position of spacetime at the Planck scale, and co-led the Fermilab Holometer -- twin co-located, power-recycled Michelson interferometers -- to search for it, ruling out the simplest models to high significance. This is a distinct fundamental-light-physics/quantum-sensing approach from squeezed-light-enhanced GW interferometers (e.g., LIGO), using precision laser interferometry to probe quantum properties of spacetime itself rather than squeezing quantum noise in a detector.

Department(s)/lab(s): Physics | MIT LIGO Laboratory @ MIT
Summary:

PREFERRED. Mavalvala's research (now balanced against her role as Dean of the School of Science) centers on gravitational-wave detection and quantum measurement science, including the original squeezed-light and quantum-noise work at LIGO that she led together with Matthew Evans. Given her administrative role, active new postdoc hiring in her own group is uncertain and should be confirmed directly.