Transforming Magnons Into Reliable Carriers for Low-Loss Hybrid Quantum Systems
A research team from the University of Vienna has extended magnon lifetimes up to 18 microseconds, about 100 times longer than before, by exciting short-wavelength magnons and cooling ultra-pure spheres of yttrium iron garnet to 30 millikelvin. The team demonstrated that the lifetime of magnons is determined by materials rather than a basic law of physics.
A research team led by Andrii Chumak from the University of Vienna has extended the lifetime of magnons, minuscule waves in magnetization, to up to 18 microseconds. This is achieved by exciting short-wavelength magnons and cooling ultra-pure spheres of yttrium iron garnet to 30 millikelvin using a mixed-phase cryostat. The team demonstrated that the lifetime of magnons is determined by materials rather than a basic law of physics. The outcome of testing three spheres with different levels of purity showed that the purer the substance, the longer the magnon lasts. With lifetimes of 18 microseconds, magnons become reliable quantum memory and low-loss communication links on a semiconductor. This breakthrough has the potential to create a 'quantum bus' necessary for scalable quantum computers.
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