An atomic-scale multi-qubit platform

 Individual electron spins in solids are promising candidates for quantum science and technology, where bottom-up assembly of a quantum device with atomically precise couplings has long been envisioned. Here, we realized atom-by-atom construction, coherent operations, and readout of coupled electron-spin qubits using a scanning tunneling microscope.

 Yu Wang, Yi Chen, Hong T Bui, Christoph Wolf, Masahiro Haze, Cristina Mier, Jinkyung Kim, Deung-Jang Choi, Christopher P Lutz, Yujeong Bae, Soo-hyon Phark, Andreas J Heinrich. Science 382, 87 - 92 (2023)

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