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

Aug 31, 2023
14 pages
Published in:
  • npj Quantum Inf. 10 (2024) 1, 22
  • Published: Feb 13, 2024
e-Print:

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Abstract: (Springer)
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.
  • spin: parity
  • semiconductor: fabrication
  • qubit: spin
  • gate
  • silicon
  • quantum dot
  • quantum error correction
  • readout
  • Pauli
  • decoherence