Observing quantum gravity
The Gravity from the Quantum Entanglement of Space Time quantum experiment will test models of quantum gravity by using an ultra-sensitive tabletop laser interferometer. Using technologies from the Laser Interferometer Gravitational-Wave Observatory, or LIGO, and the Fermilab Holometer, the novel GQuEST detector will extend sensitivity beyond the standard quantum limit by counting individual photons — or packets of energy that make up light.
In addition to enabling the first measurements of quantum gravity, GQuEST will provide a development platform for future gravitational wave detectors and other quantum experiments.
GQuEST is under construction at Fermilab and the California Institute of Technology. The instrument will be housed in newly renovated optical rooms at Caltech’s McCuller Lab. Readout, control systems, cryostats and vacuum vessels developed and built at Fermilab will integrate with the optical and mechanical components developed and built at Caltech.