Electron-spin-resonance meanderlines for effective spin control in Si quantum dots for large-scale qubit applications

Coherent control of electron spins in multiple quantum dots (QDs) is critical for realizing large-scale spin qubits. The manipulation of electron spins in Si QDs can be achieved by electron spin resonance (ESR). While the effective spin control over a single qubit has been demonstrated, the architec...

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Bibliographic Details
Published in:Applied physics letters 2021-12, Vol.119 (24)
Main Authors: Chang, Yao-Chun, Huang, Ian, Chen, Chiung-Yu, Lin, Min-Jui, Chen, Shih-Yuan, Li, Jiun-Yun
Format: Article
Language:English
Subjects:
Applied physics
Electric fields
Electron paramagnetic resonance
Electron spin
Electrons
Frequency ranges
Noise control
Quantum dots
Qubits (quantum computing)
Spin resonance
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Summary:Coherent control of electron spins in multiple quantum dots (QDs) is critical for realizing large-scale spin qubits. The manipulation of electron spins in Si QDs can be achieved by electron spin resonance (ESR). While the effective spin control over a single qubit has been demonstrated, the architecture of ESR lines for large-scale spin qubits has yet to be demonstrated. In this paper, we propose an ESR meanderline for large-scale Si QDs. Simulation results show that magnetic fields can be effectively enhanced with low electric fields using a meanderline, enabling high-fidelity and low-noise control over electron spins in a 50-qubit system. Reflection coefficients of ESR meanderlines by on-wafer microwave measurements show low loss (−7 dB) for a 3-qubit device at a frequency range of 10 to 50 GHz.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0072414