Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Optomechanics
Q 15.6: Vortrag
Dienstag, 12. März 2024, 12:30–12:45, HS 1015
Dynamics of diamagnetically levitated superconducting ellipsoids — •Fynn Köller1, Klaus Hornberger1, and Benjamin A. Stickler2 — 1University of Duisburg-Essen, Faculty of Physics, Lotharstraße 1, 47058 Duisburg, Germany — 2Ulm University, Institute for Complex Quantum Systems, Albert-Einstein-Allee 11, 89069 Ulm, Germany
Superconducting bodies can be diamagnetically levitated in magnetic quadrupole traps, where their dynamics are governed by the internal magnetization induced by the trapping field. We derive an analytical expression for the magnetization in ellipsoids, which is fully characterized by the induced dipole and quadrupole moments. These moments give rise to diamagnetic forces and torques as well as spin-rotation coupling due to the Einstein-de Haas and Barnett effects, enabling full three-dimensional alignment in the trap centre. We study the resulting dynamics and show that signatures of strong spin-rotational coupling will become observable in upcoming experiments with levitated micron-sized superconductors.