Abstract

Quantum Information Different physical implementations of qubits—quantum bits—each have their pros and cons. An appealing idea is to combine them into hybrid architectures, taking advantage of their respective strengths. Tabuchi et al. placed a ferromagnetic sphere and a superconducting qubit in a cavity and used an electromagnetic mode of the cavity as the mediator between the two. They achieved strong coupling between a collective magnetic mode of the sphere and the qubit. Viennot et al. coupled a single spin in a double quantum dot to photons in a cavity. Both approaches hold promise for future applications. Science , this issue pp. [405][1] and [408][2] [1]: /lookup/doi/10.1126/science.aaa3693 [2]: /lookup/doi/10.1126/science.aaa3786

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