Interplay of Zeeman splitting and tunnel coupling in coherent spin-qubit shuttling

Physical Review Applied 2026 Open access

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Authors: Ssu-Chih Lin, Paul Steinacker, MengKe Feng, Ajit Dash, Santiago Serrano, Wee Han Lim, Kohei M. Itoh, Fay E. Hudson, Tuomo Tanttu, André Saraiva, Arne Laucht, Andrew S. Dzurak
+2 more Hsi‐Sheng Goan, Chih Hwan Yang
DOI: 10.1103/3d1t-pr7m
Cited by: 3
References: 57

Abstract

Spin shuttling offers a promising approach for developing scalable silicon-based quantum processors by addressing the connectivity limitations of quantum dots. In this work, we demonstrate high-fidelity bucket-brigade spin shuttling in a silicon MOS device, utilizing Pauli-spin-blockade readout. We achieve an average shuttling fidelity of \SI{99.8}{\percent}. The residual shuttling error is highly sensitive to the ratio between interdot tunnel coupling and Zeeman splitting, with tuning of these parameters enabling up to a 20-fold variation in error rate. An appropriate four-level Hamiltonian model supports our findings. These results provide valuable insights for optimizing high-performance spin-shuttling systems in future quantum architectures.

Fields of Study & Subjects

Quantum and electron transport phenomena Quantum Computing Algorithms and Architecture Chemical and Physical Properties of Materials

Publication details

Journal / source
Physical Review Applied
Publisher
American Physical Society (APS)
Volume
25
Issue
3
Publication date
8 January 2026
Language
EN