Fast generation of Schrödinger cat states using a Kerr-tunable superconducting resonator
© 2023. Springer Nature Limited..
Schrödinger cat states, quantum superpositions of macroscopically distinct classical states, are an important resource for quantum communication, quantum metrology and quantum computation. Especially, cat states in a phase space protected against phase-flip errors can be used as a logical qubit. However, cat states, normally generated in three-dimensional cavities and/or strong multi-photon drives, are facing the challenges of scalability and controllability. Here, we present a strategy to generate and preserve cat states in a coplanar superconducting circuit by the fast modulation of Kerr nonlinearity. At the Kerr-free work point, our cat states are passively preserved due to the vanishing Kerr effect. We are able to prepare a 2-component cat state in our chip-based device with a fidelity reaching 89.1% under a 96 ns gate time. Our scheme shows an excellent route to constructing a chip-based bosonic quantum processor.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:14 |
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| Enthalten in: |
Nature communications - 14(2023), 1 vom: 11. Okt., Seite 6358 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
He, X L [VerfasserIn] |
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Date Revised 19.11.2023 published: Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1038/s41467-023-42057-0 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a © 2023. Springer Nature Limited. | ||
| 520 | |a Schrödinger cat states, quantum superpositions of macroscopically distinct classical states, are an important resource for quantum communication, quantum metrology and quantum computation. Especially, cat states in a phase space protected against phase-flip errors can be used as a logical qubit. However, cat states, normally generated in three-dimensional cavities and/or strong multi-photon drives, are facing the challenges of scalability and controllability. Here, we present a strategy to generate and preserve cat states in a coplanar superconducting circuit by the fast modulation of Kerr nonlinearity. At the Kerr-free work point, our cat states are passively preserved due to the vanishing Kerr effect. We are able to prepare a 2-component cat state in our chip-based device with a fidelity reaching 89.1% under a 96 ns gate time. Our scheme shows an excellent route to constructing a chip-based bosonic quantum processor | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Lu, Yong |e verfasserin |4 aut | |
| 700 | 1 | |a Bao, D Q |e verfasserin |4 aut | |
| 700 | 1 | |a Xue, Hang |e verfasserin |4 aut | |
| 700 | 1 | |a Jiang, W B |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Z |e verfasserin |4 aut | |
| 700 | 1 | |a Roudsari, A F |e verfasserin |4 aut | |
| 700 | 1 | |a Delsing, Per |e verfasserin |4 aut | |
| 700 | 1 | |a Tsai, J S |e verfasserin |4 aut | |
| 700 | 1 | |a Lin, Z R |e verfasserin |4 aut | |
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