Quantum Physics2026-05-271 minarXiv:2605.28479expressMagnetic Float Cooled to MillikelvinsA magnet the size of a grain of rice floats in a vacuum without touching the walls. It is held by the magnetic field of a superconducting trap — a ring cooled to a state where current flows without resistance.Dennis G. Uitenbroek·Jurriaan Langendorff·Tjerk H. OosterkampHendrik LorentzJames Clerk MaxwellFritz Zwickymagnetic fieldsuperconductivitygravitational waves👍👎☆SimplePopularAdvanced