Lifetime of magnons extended from few hundred ns to 18 μs enabling mini quantum computers useful for complex calculations

https://www.eurekalert.org/news-releases/1126720

"used: (1) short-wavelength magnons naturally blinding to surface material's defects, (2) ultra-pure yttrium iron garnet spheres cooled to 30 mK freezing out thermal vibrations... unlike photons/ superconducting qubits, magnon wavelengths can be shrunk to nm-scale fitting quantum circuits on penny-size chip, compared to room-sized required for many current quantum processors... acts as bus connecting 100s of qubits/ linking different types of quantum systems... future: more crystal purification for >18 μs"