Rapid single-shot parity spin readout in a silicon double quantum dot with fidelity exceeding 99%

Kenta Takeda*, Akito Noiri, Takashi Nakajima, Leon C. Camenzind, Takashi Kobayashi, Amir Sammak, Giordano Scappucci, Seigo Tarucha*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Silicon-based spin qubits offer a potential pathway toward realizing a scalable quantum computer owing to their compatibility with semiconductor manufacturing technologies. Recent experiments in this system have demonstrated crucial technologies, including high-fidelity quantum gates and multiqubit operation. However, the realization of a fault-tolerant quantum computer requires a high-fidelity spin measurement faster than decoherence. To address this challenge, we characterize and optimize the initialization and measurement procedures using the parity-mode Pauli spin blockade technique. Here, we demonstrate a rapid (with a duration of a few μs) and accurate (with >99% fidelity) parity spin measurement in a silicon double quantum dot. These results represent a significant step forward toward implementing measurement-based quantum error correction in silicon.

Original languageEnglish
Article number22
Number of pages6
JournalNPJ Quantum Information
Volume10
Issue number1
DOIs
Publication statusPublished - 2024

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