Long-range spin wave mediated control of defect qubits in nanodiamonds
By Paolo Andrich, Charles F. de las Casas, Xiaoying Liu, H. Bretscher, Jonson R. Berman, F. Heremans, P. Nealey, David D. Awschalom. npj Quantum Information, 2017
147 citations recorded by the source corpus.
Hybrid architectures that combine nitrogen-vacancy centers in diamond with other materials and physical systems have been proposed to enhance the nitrogen-vacancy center’s capabilities in many quantum sensing and information applications. In particular, spin waves in ferromagnetic materials are a promising candidate to implement these platforms due to their strong magnetic fields, which could be used to efficiently interact with the nitrogen-vacancy centers. Here, we develop an yttrium iron garnet-nanodiamond hybrid architecture constructed with the help of directed assembly and transfer printing techniques. Operating at ambient conditions, we demonstrate that surface confined spin waves excited in the ferromagnet can strongly amplify the interactions between a microwave source and the nitrogen-vacancy centers by enhancing the local microwave magnetic field by several orders of magnitude. Crucially, we show the existence of a regime in which coherent interactions between spin waves and nitrogen-vacancy centers dominate over incoherent mechanisms associated with the broadband magnetic field noise generated by the ferromagnet. These accomplishments enable the spin wave mediated coherent control of spin qubits over distances larger than 200 μm, and allow low power operations for future spintronic technologies. Hybrid architectures that combine materials and devices with widely different properties promise to be at the forefront of scalable quantum systems by unlocking access to more than the simple sum of their parts. A team led by David Awschalom at the University of Chicago has now revealed the possibility of using collective spin oscillations in a ferromagnet to mediate long-range, coherent interactions between a microwave source and spin qubits confined in diamond nanoparticles. The strong surface confinement of the ferromagnet excitations and their slow decay result in an effective amplification of the source field over hundreds of micrometers at ambient conditions. This effect can extend the capabilities of solid state qubits for quantum information and nanoscale quantum sensing applications.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/eee41ddee5aa948ac8b95658ee2c2a20f586018d
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Cavity magnonics (2021, background): “If magnon lifetime can be sufficiently improved, combining them with a high-speed intermediary with long coherence length, such as photons, may provide a novel platform for quantum information transfer over macroscopic distances (Andrich et al., 2017; Fukami et al., 2021).”