Optical Interferometric Readout of a Magnetically Levitated Superconducting Microsphere

J. J. Hansen, S. Minniberger, D. Ilk +8

We probe the motion of a 6 $\mu g$ magnetically levitated superconducting microsphere using optical interferometry at 3 K, achieving a resolution better than 1 $nm/\sqrt{Hz}$, and us…