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Coherent coupling between a ferromagnetic magnon and a superconducting qubit.(QUANTUM INFORMATION)(Report)(Author abstract)

Tabuchi, Yutaka ; Ishino, Seiichiro ; Noguchi, Atsushi ; Ishikawa, Toyofumi ; Yamazaki, Rekishu ; Usami, Koji ; Nakamura, Yasunobu

Science, July 24, 2015, Vol.349(6246), p.405(4) [Periódico revisado por pares]

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  • Título:
    Coherent coupling between a ferromagnetic magnon and a superconducting qubit.(QUANTUM INFORMATION)(Report)(Author abstract)
  • Autor: Tabuchi, Yutaka ; Ishino, Seiichiro ; Noguchi, Atsushi ; Ishikawa, Toyofumi ; Yamazaki, Rekishu ; Usami, Koji ; Nakamura, Yasunobu
  • Assuntos: Superconductors – Properties ; Ferromagnetic Materials – Properties
  • É parte de: Science, July 24, 2015, Vol.349(6246), p.405(4)
  • Descrição: Rigidity of an ordered phase in condensed matter results in collective excitation modes spatially extending to macroscopic dimensions. A magnon is a quantum of such collective excitation modes in ordered spin systems. Here, we demonstrate the coherent coupling between a single-magnon excitation in a millimeter-sized ferromagnetic sphere and a superconducting qubit, with the interaction mediated by the virtual photon excitation in a microwave cavity. We obtain the coupling strength far exceeding the damping rates, thus bringing the hybrid system into the strong coupling regime. Furthermore, we use a parametric drive to realize a tunable magnon-qubit coupling scheme. Our approach provides a versatile tool for quantum control and measurement of the magnon excitations and may lead to advances in quantum information processing. 10.1126/science.aab3693
  • Idioma: Inglês

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