Current biased gradiometric flux qubit in a circuit-QED architecture
We propose a scheme for controlling the gradiometric flux qubit (GFQ) by applying an ac bias current in a circuit-QED architecture. The GFQ is insensitive to the magnetic flux fluctuations, which at the same time makes it challenging to manipulate the qubit states by an external magnetic field. In t...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ac4281 |
| _version_ | 1797748573685678080 |
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| author | Mun Dae Kim |
| author_facet | Mun Dae Kim |
| author_sort | Mun Dae Kim |
| collection | DOAJ |
| description | We propose a scheme for controlling the gradiometric flux qubit (GFQ) by applying an ac bias current in a circuit-QED architecture. The GFQ is insensitive to the magnetic flux fluctuations, which at the same time makes it challenging to manipulate the qubit states by an external magnetic field. In this study, we demonstrate that an ac bias current applied to the α -junction of the GFQ can control the qubit states. Further, the present scheme is robust against the charge fluctuations as well as the magnetic flux fluctuations, promising a long coherence time for quantum gate operations. We introduce a circuit-QED architecture to perform the single and two-qubit operations with a sufficiently strong coupling strength. |
| first_indexed | 2024-03-12T16:06:44Z |
| format | Article |
| id | doaj.art-99c12f11eb9f4df6adaadb1276e5c894 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:06:44Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-99c12f11eb9f4df6adaadb1276e5c8942023-08-09T14:19:10ZengIOP PublishingNew Journal of Physics1367-26302021-01-0124101300310.1088/1367-2630/ac4281Current biased gradiometric flux qubit in a circuit-QED architectureMun Dae Kim0College of Liberal Arts, Hongik University , Sejong 30016, Republic of KoreaWe propose a scheme for controlling the gradiometric flux qubit (GFQ) by applying an ac bias current in a circuit-QED architecture. The GFQ is insensitive to the magnetic flux fluctuations, which at the same time makes it challenging to manipulate the qubit states by an external magnetic field. In this study, we demonstrate that an ac bias current applied to the α -junction of the GFQ can control the qubit states. Further, the present scheme is robust against the charge fluctuations as well as the magnetic flux fluctuations, promising a long coherence time for quantum gate operations. We introduce a circuit-QED architecture to perform the single and two-qubit operations with a sufficiently strong coupling strength.https://doi.org/10.1088/1367-2630/ac4281gradiometric flux qubitac current biascircuit-QED |
| spellingShingle | Mun Dae Kim Current biased gradiometric flux qubit in a circuit-QED architecture New Journal of Physics gradiometric flux qubit ac current bias circuit-QED |
| title | Current biased gradiometric flux qubit in a circuit-QED architecture |
| title_full | Current biased gradiometric flux qubit in a circuit-QED architecture |
| title_fullStr | Current biased gradiometric flux qubit in a circuit-QED architecture |
| title_full_unstemmed | Current biased gradiometric flux qubit in a circuit-QED architecture |
| title_short | Current biased gradiometric flux qubit in a circuit-QED architecture |
| title_sort | current biased gradiometric flux qubit in a circuit qed architecture |
| topic | gradiometric flux qubit ac current bias circuit-QED |
| url | https://doi.org/10.1088/1367-2630/ac4281 |
| work_keys_str_mv | AT mundaekim currentbiasedgradiometricfluxqubitinacircuitqedarchitecture |