Room-temperature magnetic levitating rotor in near vacuum eliminates eddy-current damping for ultraprecise classic/ quantum macroscale sensors

https://www.eurekalert.org/news-releases/1100993

"levitation isolates rotors' torque/ angular momentum to more accurately measure gravity, gas pressure, momentum, linear acceleration... diamagnetically levitating rotor: 1 cm graphite disk floating above 3 round magnets stacked... eddy currents forming inside material resists motion a bit like frictional drag, hindering measurements, overcome with plate design experiencing only slight eddy-current damping inside silica-coated graphite grains but no damping in rotor... cooling/ slowing rotation makes motion quantum"