A chip-based superconducting magnetic trap for levitating superconducting microparticles

Abstract

Magnetically-levitated superconducting microparticles have been recently proposed as a promising platform for performing quantum experiments with particles in the picogram regime. Here, we demonstrate the superconducting technology to achieve chip-based magnetic levitation of superconducting microparticles. We simulate and fabricate a chip-based magnetic trap capable of levitating superconducting particles with diameters from 0.5$\mu$m to 200$\mu$m. The trap consists of two stacked silicon chips, each patterned with a planar multi-winding superconducting coil made of niobium. The two coils generate a magnetic field resembling a quadrupole near the trap center, in which we demonstrate trapping of a spherical 50\,$\mu$m diameter SnPb microparticle at temperatures of 4\,K and 40\,mK.

6 pages, 6 figures, video material available at https://doi.org/10.5281/zenodo.5911190

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Cited by in corpus (12)

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• Levitated Optomechanics with Meta-Atoms
• Maglev for Dark Matter: Dark-photon and axion dark matter sensing with levitated superconductors
• Vacuum levitation and motion control on chip
• Optimal quantum parametric feedback cooling
• Superconducting Levitated Detector of Gravitational Waves
• Stable magnetic levitation of soft ferromagnets for macroscopic quantum mechanics
• Superconducting flip-chip devices using indium microspheres on Au-passivated Nb or NbN as under-bump metallization layer
• Modelling magnetically-levitated superconducting ellipsoids, cylinders and cuboids for quantum magnetomechanics
• Surface-induced decoherence and heating of charged particles
• Modification of adhesion between microparticles and engineered silicon surfaces