Preprint

FZJ-2025-02173

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Large spin shuttling oscillations enabling high-fidelity single qubit gates

Pazhedath, A. M.FZJ* ; David, A.FZJ* ; Oberländer, M. ; Müller, M. M. ; Calarco, T.FZJ* ; Bluhm, H.FZJ* ; Motzoi, F.FZJ*

2024
arXiv

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Please use a persistent id in citations: doi:10.48550/ARXIV.2403.00601  doi:10.34734/FZJ-2025-02173

Abstract: Semiconductor quantum dots have shown impressive breakthroughs in the last years, with single and two qubit gate fidelities matching other leading platforms and scalability still remaining a relative strength. However, due to qubit wiring considerations, mobile electron architectures have been proposed to facilitate upward scaling. In this work, we examine and demonstrate the possibility of significantly outperforming static EDSR-type single-qubit pulsing by taking advantage of the larger spatial mobility to achieve larger Rabi frequencies and reduce the effect of charge noise. Our theoretical results indicate that fidelities are ultimately bottlenecked by spin-valley physics, which can be suppressed through the use of quantum optimal control, and we demonstrate that, across different potential regimes and competing physical models, shuttling based single-qubit gates retain significant advantage over existing alternatives.

Keyword(s): Quantum Physics (quant-ph) ; Mesoscale and Nanoscale Physics (cond-mat.mes-hall) ; FOS: Physical sciences

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Contributing Institute(s):

1. Quantum Control (PGI-8)
2. JARA Institut Quanteninformation (PGI-11)

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)
2. EXC 2004:  Matter and Light for Quantum Computing (ML4Q) (390534769) (390534769)

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Database coverage:

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