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Researchers at KIT have successfully repurposed magnetic vortices in granular aluminum films from energy-draining defects into stable, low-loss qubits by leveraging the material's nanoscale island structure. This breakthrough transforms a historical limitation of superconducting materials into a viable resource for building quantum computers and high-sensitivity sensors. The findings, published in Nature, demonstrate that these vortex states behave like artificial atoms, offering a new pathway for advancing quantum hardware architecture.
Granular Aluminum Films Stabilize Quantum Vortex States for Qubits
Researchers at the Karlsruhe Institute of Technology have demonstrated that magnetic vortices in superconductors, previously considered disruptive, can be utilized as controllable quantum systems. This finding, achieved through experiments with granular aluminum films, presents a new resource for developing quantum computers, sensors, and materials research.
Researchers at the Karlsruhe Institute of Technology (KIT) have experimentally demonstrated that magnetic vortices, previously considered a limitation in superconducting materials, can be harnessed as controllable quantum systems. The team proved that in certain granular aluminum films, these tiny, quantized vortices, which typically drain energy, instead form stable, low-loss states suitable for use as qubits. This reframes a long-standing problem as a potential…
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