TY - JOUR
T1 - Operating semiconductor quantum processors with hopping spins
AU - Wang, Chien An
AU - John, Valentin
AU - Tidjani, Hanifa
AU - Yu, Cécile X.
AU - Ivlev, Alexander S.
AU - Déprez, Corentin
AU - van Riggelen-Doelman, Floor
AU - Woods, Benjamin D.
AU - Hendrickx, Nico W.
AU - Lawrie, William I.L.
AU - Stehouwer, Lucas E.A.
AU - Oosterhout, Stefan D.
AU - Sammak, Amir
AU - Friesen, Mark
AU - Scappucci, Giordano
AU - de Snoo, Sander L.
AU - Rimbach-Russ, Maximilian
AU - Borsoi, Francesco
AU - Veldhorst, Menno
N1 - Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
PY - 2024
Y1 - 2024
N2 - Qubits that can be efficiently controlled are essential for the development of scalable quantum hardware. Although resonant control is used to execute high-fidelity quantum gates, the scalability is challenged by the integration of high-frequency oscillating signals, qubit cross-talk, and heating. Here, we show that by engineering the hopping of spins between quantum dots with a site-dependent spin quantization axis, quantum control can be established with discrete signals. We demonstrate hopping-based quantum logic and obtain single-qubit gate fidelities of 99.97%, coherent shuttling fidelities of 99.992% per hop, and a two-qubit gate fidelity of 99.3%, corresponding to error rates that have been predicted to allow for quantum error correction. We also show that hopping spins constitute a tuning method by statistically mapping the coherence of a 10-quantum dot system. Our results show that dense quantum dot arrays with sparse occupation could be developed for efficient and high-connectivity qubit registers.
AB - Qubits that can be efficiently controlled are essential for the development of scalable quantum hardware. Although resonant control is used to execute high-fidelity quantum gates, the scalability is challenged by the integration of high-frequency oscillating signals, qubit cross-talk, and heating. Here, we show that by engineering the hopping of spins between quantum dots with a site-dependent spin quantization axis, quantum control can be established with discrete signals. We demonstrate hopping-based quantum logic and obtain single-qubit gate fidelities of 99.97%, coherent shuttling fidelities of 99.992% per hop, and a two-qubit gate fidelity of 99.3%, corresponding to error rates that have been predicted to allow for quantum error correction. We also show that hopping spins constitute a tuning method by statistically mapping the coherence of a 10-quantum dot system. Our results show that dense quantum dot arrays with sparse occupation could be developed for efficient and high-connectivity qubit registers.
UR - http://www.scopus.com/inward/record.url?scp=85199639168&partnerID=8YFLogxK
U2 - 10.1126/science.ado5915
DO - 10.1126/science.ado5915
M3 - Article
C2 - 39052794
AN - SCOPUS:85199639168
SN - 0036-8075
VL - 385
SP - 447
EP - 452
JO - Science (New York, N.Y.)
JF - Science (New York, N.Y.)
IS - 6707
ER -