Levitation of a YIG sphere using a magnetic Paul trap - towards strongly coupled quantum magno-mechanics

• URL: http://arxiv.org/abs/2608.12752v1
• Date: Thu, 13 Aug 2026 03:04:25 GMT
• Title: Levitation of a YIG sphere using a magnetic Paul trap - towards strongly coupled quantum magno-mechanics
• Abstract summary: Magnons couple to many physical quantities and strongly to electromagnetic fields, even at room temperature.<n>We present a classical stability analysis of a magnetic Paul trap and show the stability diagram for all mechanical degrees of freedom.<n>We experimentally levitate the soft magnet yttrium iron garnet at room temperature obtaining Q-factors of $sim25$ and secular frequencies $15.8$ Hz and $17.2$ Hz.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Magnetic levitation offer passive levitation of massive objects for use in advanced inertia sensors, for the generation of non-classical macroscopic motional states, and towards the table-top testing of low energy gravity with quantum mechanics. Magnons, a quanta of spin wave, couple to many physical quantities and strongly to electromagnetic fields, even at room temperature. In this work we demonstrate the stable trapping of a small YIG sphere using a magnetic Paul trap. We present a classical stability analysis of a magnetic Paul trap and show the stability diagram for all mechanical degrees of freedom. We show that coupling between librational and translational modes changes the stability region. We experimentally levitate the soft magnet yttrium iron garnet at room temperature obtaining Q-factors of $\sim25$ and secular frequencies $15.8$ Hz and $17.2$ Hz. We provide numerical estimates of the achievable enhanced coupling between the center-of-mass motion and excited magnon modes, with a cooperativity above unity despite strong mechanical damping, indicating potential applications in quantum information processing, quantum interconnects and quantum memories.

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