2013/02/01 by Jarryd J. Pla, J. Jarryd, Kuan Yen Tan +10
Engineering · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Quantum and electron transport phenomena #Semiconductor materials and devices #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1038/nature12011
published as Nature 496, 334 (2013) · 18 pages, 5 figures
arxiv created 2013/02/01 · openalex publication_date 2013/04/01 · arxiv updated 2013/05/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A single nuclear spin holds the promise of being a long-lived quantum bit or quantum memory, with the high fidelities required for fault-tolerant quantum computing. We show here that such promise could be fulfilled by a single phosphorus (31P) nuclear spin in a silicon nanostructure. By integrating single-shot readout of the electron spin with on-chip electron spin resonance, we demonstrate the quantum non-demolition, electrical single-shot readout of the nuclear spin, with readout fidelity better than 99.8% - the highest for any solid-state qubit. The single nuclear spin is then operated as a qubit by applying coherent radiofrequency (RF) pulses. For an ionized 31P donor we find a nuclear spin coherence time of 60 ms and a 1-qubit gate control fidelity exceeding 98%. These results demonstrate that the dominant technology of modern electronics can be adapted to host a complete electrical measurement and control platform for nuclear spin-based quantum information processing.