Nanowerk October 22, 2022
Researchers at the University of Colorado combined entanglement and delocalization to create a matter-wave interferometer that can sense accelerations with a precision that surpasses the standard quantum limit. In their system each individual atom fell freely under gravity and simultaneously traversed two paths through space while entangled with the other atoms. They demonstrated both quantum non-demolition measurements and cavity-mediated spin interactions for generating squeezed momentum states with directly observed sensitivity 3.4+1.1−0.9 dB and 2.5+0.6−0.6 dB below the standard quantum limit, respectively. They injected an entangled state into a Mach–Zehnder light-pulse interferometer with directly observed sensitivity 1.7+0.5−0.5 dB below the standard quantum limit. According to the researchers the combination of particle delocalization and entanglement in their approach may influence developments of enhanced inertial sensors searches for new physics, particles and fields future advanced gravitational wave detectors and accessing beyond mean-field quantum many-body physics…read more. Open Access TECHNICAL ARTICLEÂ
Experimental overview. Credit: Nature volume 610, pages472–477 (2022)Â