Single-shot latched readout of a quantum dot qubit using barrier gate pulsing
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arXiv
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| Format: | Preprint |
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2024
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| author | Park, Sanghyeok Benson, Jared Corrigan, J. Dodson, J. P. Coppersmith, S. N. Friesen, Mark Eriksson, M. A. |
| author_facet | Park, Sanghyeok Benson, Jared Corrigan, J. Dodson, J. P. Coppersmith, S. N. Friesen, Mark Eriksson, M. A. |
| contents | Latching techniques are widely used to enhance readout of qubits. These methods require precise tuning of multiple tunnel rates, which can be challenging to achieve under realistic experimental conditions, such as when a qubit is coupled to a single reservoir. Here, we present a method for single-shot measurement of a quantum dot qubit with a single reservoir using a latched-readout scheme. Our approach involves pulsing a barrier gate to dynamically control qubit-to-reservoir tunnel rates, a method that is readily applicable to the latched readout of various spin-based qubits. We use this method to enable qubit state latching and to reduce the qubit reset time in measurements of coherent Larmor oscillations of a Si/SiGe quantum dot hybrid qubit. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_15380 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Single-shot latched readout of a quantum dot qubit using barrier gate pulsing Park, Sanghyeok Benson, Jared Corrigan, J. Dodson, J. P. Coppersmith, S. N. Friesen, Mark Eriksson, M. A. Mesoscale and Nanoscale Physics Quantum Physics Latching techniques are widely used to enhance readout of qubits. These methods require precise tuning of multiple tunnel rates, which can be challenging to achieve under realistic experimental conditions, such as when a qubit is coupled to a single reservoir. Here, we present a method for single-shot measurement of a quantum dot qubit with a single reservoir using a latched-readout scheme. Our approach involves pulsing a barrier gate to dynamically control qubit-to-reservoir tunnel rates, a method that is readily applicable to the latched readout of various spin-based qubits. We use this method to enable qubit state latching and to reduce the qubit reset time in measurements of coherent Larmor oscillations of a Si/SiGe quantum dot hybrid qubit. |
| title | Single-shot latched readout of a quantum dot qubit using barrier gate pulsing |
| topic | Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2408.15380 |