Researchers break quantum limit in the precision of force and position measurements

Researchers of the Schliesser Lab at the Niels Bohr Institute, University of Copenhagen, have pushed the precision of force and position measurements into a new regime. Their experiment is the first to surpass the so-called "Standard Quantum Limit," or SQL, which arises in the most common (and successful) optical techniques for ultra-precise position measurements. For more than 50 years, experimentalists have raced to beat the SQL using a variety of techniques, but to no avail. In their recent w...