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<p>Qubit latching techniques require precise tuning of multiple tunnel rates, which can be challenging when a qubit is coupled to a single reservoir. Here, we present such a method for single-shot measurement, in which the barrier gate is pulsed to dynamically control qubit-to-reservoir tunnel rates. We use it to reduce the qubit reset time in measurements of coherent Larmor oscillations of a Si/SiGe quantum dot hybrid qubit. The method is also readily applicable to other types of spin-based qubits.</p>

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Single shot latched readout of a quantum dot qubit using barrier gate pulsing

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月2日

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  • Sanghyeok Park,
  • Jared Benson,
  • J. Corrigan,
  • J. P. Dodson,
  • S. N. Coppersmith,
  • Mark Friesen,
  • M. A. Eriksson

摘要

Qubit latching techniques require precise tuning of multiple tunnel rates, which can be challenging when a qubit is coupled to a single reservoir. Here, we present such a method for single-shot measurement, in which the barrier gate is pulsed to dynamically control qubit-to-reservoir tunnel rates. We use it to reduce the qubit reset time in measurements of coherent Larmor oscillations of a Si/SiGe quantum dot hybrid qubit. The method is also readily applicable to other types of spin-based qubits.