Quantum Machines Seminar by Maria Fuwa on Meissner Levitation of Soft Ferromagnetic Insulators
Quantum Machines Unit - Zoom Seminar open to OIST
Meissner Levitation of Soft Ferromagnetic Insulators
Magnetic levitation is developing as a promising tool to realize quantum limited accelerometers, gyroscopes, and magnetic rotors. Here I will introduce the development of stable levitation of a soft ferromagnet insulator Yttrium Iron Garnet (YIG). Since Earnshaw’s theorem necessitates diamagnetism for stable magnetic levitation, we use magnetic field gradient for levitation, and the Meissner effect for horizontal stabilization. While magnetic levitations realized thus far have used hard magnets, soft ferromagnet levitation enables coupling of internal electron spin degrees of freedom (magnons) with external rigid body movement. This hybrid magneto-mechanical system can allow delving into novel physics such as, Einstein de Haas physics, rotational superpositions, to Stern Gerlach interferometry of masses (BMV experiment).
Maria Fuwa is a research associate at the Research Center for Advanced Science and Technology, The University of Tokyo. She received her PhD in the field of quantum optics, where she demonstrated deterministic quantum teleportation of qubits as well as proved the single photon nonlocality. Whereafter she started working on hybrid quantum physics of light, microwaves, and magnons, with hope to utilize nonlinear quantum effects that were not possible all optically in the future. Previously, she was a scientist at the Max Planck Institute for the Science of Light, and Australian National University.