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Coherent coupling between a ferromagnetic magnon and a superconducting qubit
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Coherent coupling between a ferromagnetic magnon and a superconducting qubit
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Journal Article
Coherent coupling between a ferromagnetic magnon and a superconducting qubit
2015
Overview
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.
Publisher
American Association for the Advancement of Science,The American Association for the Advancement of Science
Subject
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