High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier
We report high-fidelity, quantum non-demolition, single-shot readout of a superconducting transmon qubit using a dc-biased superconducting low-inductance undulatory galvanometer (SLUG) amplifier. The SLUG improves the system signal-to-noise ratio by $6.5\;{\rm dB}$ in a $20\;{\rm MHz}$ window compar...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2014-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/16/11/113008 |
| _version_ | 1797751517976985600 |
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| author | Yanbing Liu Srikanth J Srinivasan D Hover Shaojiang Zhu R McDermott A A Houck |
| author_facet | Yanbing Liu Srikanth J Srinivasan D Hover Shaojiang Zhu R McDermott A A Houck |
| author_sort | Yanbing Liu |
| collection | DOAJ |
| description | We report high-fidelity, quantum non-demolition, single-shot readout of a superconducting transmon qubit using a dc-biased superconducting low-inductance undulatory galvanometer (SLUG) amplifier. The SLUG improves the system signal-to-noise ratio by $6.5\;{\rm dB}$ in a $20\;{\rm MHz}$ window compared with a bare high electron mobility transistor amplifier. An optimal cavity drive pulse is chosen using a genetic search algorithm, leading to a maximum combined readout and preparation fidelity of $91.9\%$ with a measurement time of ${{T}_{{\rm meas}}}=200\;{\rm ns}$ . Using post-selection to remove preparation errors caused by heating, we realize a combined preparation and readout fidelity of $94.3\%$ . |
| first_indexed | 2024-03-12T16:50:39Z |
| format | Article |
| id | doaj.art-724b914d25574cef86cdbaea32d717a8 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:50:39Z |
| publishDate | 2014-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-724b914d25574cef86cdbaea32d717a82023-08-08T11:21:48ZengIOP PublishingNew Journal of Physics1367-26302014-01-01161111300810.1088/1367-2630/16/11/113008High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifierYanbing Liu0Srikanth J Srinivasan1D Hover2Shaojiang Zhu3R McDermott4A A Houck5Department of Electrical Engineering, Princeton University , Princeton, New Jersey 08544, USADepartment of Electrical Engineering, Princeton University , Princeton, New Jersey 08544, USA; IBM T. J. Watson Research Center, Yorktown Heights , New York 10598, USADepartment of Physics, University of Wisconsin , Madison, Wisconsin 53706, USADepartment of Physics, University of Wisconsin , Madison, Wisconsin 53706, USADepartment of Physics, University of Wisconsin , Madison, Wisconsin 53706, USADepartment of Electrical Engineering, Princeton University , Princeton, New Jersey 08544, USAWe report high-fidelity, quantum non-demolition, single-shot readout of a superconducting transmon qubit using a dc-biased superconducting low-inductance undulatory galvanometer (SLUG) amplifier. The SLUG improves the system signal-to-noise ratio by $6.5\;{\rm dB}$ in a $20\;{\rm MHz}$ window compared with a bare high electron mobility transistor amplifier. An optimal cavity drive pulse is chosen using a genetic search algorithm, leading to a maximum combined readout and preparation fidelity of $91.9\%$ with a measurement time of ${{T}_{{\rm meas}}}=200\;{\rm ns}$ . Using post-selection to remove preparation errors caused by heating, we realize a combined preparation and readout fidelity of $94.3\%$ .https://doi.org/10.1088/1367-2630/16/11/113008superconducting qubitmicrowave amplifiergenetic algorithm |
| spellingShingle | Yanbing Liu Srikanth J Srinivasan D Hover Shaojiang Zhu R McDermott A A Houck High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier New Journal of Physics superconducting qubit microwave amplifier genetic algorithm |
| title | High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier |
| title_full | High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier |
| title_fullStr | High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier |
| title_full_unstemmed | High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier |
| title_short | High fidelity readout of a transmon qubit using a superconducting low-inductance undulatory galvanometer microwave amplifier |
| title_sort | high fidelity readout of a transmon qubit using a superconducting low inductance undulatory galvanometer microwave amplifier |
| topic | superconducting qubit microwave amplifier genetic algorithm |
| url | https://doi.org/10.1088/1367-2630/16/11/113008 |
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