JP2021118342A - 超伝導回路用ダイポール素子 - Google Patents
超伝導回路用ダイポール素子 Download PDFInfo
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- H03K19/195—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using superconductive devices
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Abstract
Description
と分解でき、ここで、係数φiはモードiが接合間の位相差にどの程度影響するかに関連する。φiが大きいほど、接合に関与するモードiが多くなると言われる。テイラー展開EJcos(φ)により、偶数波混合のみが生じる。
3 ジョセフソン接合
4 インダクタンス
5 ループ
6 第1のループ
7 コイル
8 第2のループ
9 コイル
10 磁束線
11 磁束線
12 磁束線
13 容量性デバイス
14 容量結合
15 インダクタンス
16 キャパシタ
20 バッファ共振器、非線形共振器
30 ストレージ共振器、線形共振器
Claims (9)
- 超伝導マイクロ波量子回路用の誘導性ダイポール素子であって、前記ダイポール素子は、インダクタンスによってシャントされた一対のジョセフソン接合によって形成されたDC−SQUIDを含み、前記ジョセフソン接合は等しいエネルギーを有し、前記ジョセフソン接合および前記インダクタンスは、前記接合の各々が前記インダクタンスとループを形成するように配置され、前記2つのループは、φext1=πかつφext2=0となるように、外部DC磁束φext1およびφext2によりそれぞれ非対称的に貫かれ、パラメトリックポンピングは、前記ダイポール素子を貫く全磁束φΣ=φext,1+φext,2を変調することにより可能になり、これにより、カーのような相互作用のない前記ダイポール素子に関与するモード間での偶数波混合を可能にする、ダイポール素子。
- 前記パラメトリックポンピングは、適切な変調位相および振幅でφΔ=φext,1−φext,2も変調することによってさらに可能になる、請求項1に記載のダイポール素子。
- 前記外部DC磁束φext,1およびφext,2は、DC電流およびAC電流の両方が循環する超伝導ループに隣接する超伝導線を介して印加される、請求項1に記載のダイポール素子。
- 前記超伝導線は前記ループのワイヤに直接接続される、請求項3に記載のダイポール素子。
- 前記超伝導線は、1つの入力電流IΣが前記ダイポール素子の全磁束φΣ=φext,1+φext,2にバイアスをかけ、別の入力電流IΔが前記ダイポール素子の差分磁束φΔ=φext,1−φext,2にバイアスをかけるように配置され、前記パラメトリックポンピングは、IΣの振動成分によって生成される振動磁束によって送達される、請求項3に記載のダイポール素子。
- 前記インダクタンスは、平坦なまたは粒状の超伝導材料で作られた超伝導ワイヤを含む、請求項1に記載のダイポール素子。
- 前記インダクタンスは、互いに直列に接続されたジョセフソン接合のチェーンを含む、請求項1に記載のダイポール素子。
- 前記接合エネルギーの自然な非対称性を説明するために、前記接合のうちの1つがDC−SQUIDに置き換えられる、請求項1に記載のダイポール素子。
- 請求項1に記載のダイポール素子を含む超伝導マイクロ波量子回路であって、前記ダイポール素子は容量的にシャントされ、線形共振器に結合された非線形共振器を形成し、前記パラメトリックにポンピングされたダイポール素子によって提供される非線形相互作用は、前記線形共振器と前記非線形共振器との間で2対1の光子交換を生じさせる、超伝導マイクロ波量子回路。
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US11545288B2 (en) * | 2020-04-15 | 2023-01-03 | Northrop Grumman Systems Corporation | Superconducting current control system |
US11468219B2 (en) | 2020-11-13 | 2022-10-11 | Amazon Technologies, Inc. | Toffoli gate preparation for a quantum hardware system comprising hybrid acoustic-electrical qubits |
US11321627B1 (en) * | 2020-11-13 | 2022-05-03 | Amazon Technologies, Inc. | Fault-tolerant quantum hardware using hybrid acoustic-electrical qubits |
US11741279B2 (en) | 2020-11-13 | 2023-08-29 | Amazon Technologies, Inc. | Toffoli gate distillation from Toffoli magic states |
US11580436B2 (en) | 2020-12-04 | 2023-02-14 | Amazon Technologies, Inc. | Stabilizer measurement decoding using additional edges to identify errors caused by cross-talk |
US11983601B2 (en) | 2021-03-30 | 2024-05-14 | Amazon Technologies, Inc. | Hybrid bacon-shor surface codes in a concatenated cat-qubit architecture |
US11831291B2 (en) | 2021-12-06 | 2023-11-28 | International Business Machines Corporation | Josphson band pass to band stop filter |
EP4207005A1 (en) * | 2021-12-31 | 2023-07-05 | Alice & Bob | Non-linear superconducting quantum circuit |
FR3133690A1 (fr) | 2022-03-16 | 2023-09-22 | Alice & Bob | Code de répétition asymétrique pour qubit de chat |
EP4383139A1 (en) * | 2022-12-07 | 2024-06-12 | Alice & Bob | Superconducting quantum circuit for bosonic codes with galvanic coupling |
EP4383146A1 (en) | 2022-12-07 | 2024-06-12 | Institut National de Recherche en Informatique et en Automatique | Device and method for phase flip reduction in cat-qubits |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05203712A (ja) * | 1991-07-23 | 1993-08-10 | Internatl Business Mach Corp <Ibm> | 3接合超伝導量子干渉デバイス・ミクサ |
US5488295A (en) * | 1990-05-15 | 1996-01-30 | Valtion Teknillinen Tutkimuskeskus | Method and apparatus for cancelling noise of a low-noise sensor |
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US10050630B2 (en) * | 2016-08-19 | 2018-08-14 | Rigetti & Co, Inc. | Flux-tunable qubit device with multiple Josephson junctions |
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- 2020-02-14 KR KR1020200018304A patent/KR20210095784A/ko not_active Application Discontinuation
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5488295A (en) * | 1990-05-15 | 1996-01-30 | Valtion Teknillinen Tutkimuskeskus | Method and apparatus for cancelling noise of a low-noise sensor |
JPH05203712A (ja) * | 1991-07-23 | 1993-08-10 | Internatl Business Mach Corp <Ibm> | 3接合超伝導量子干渉デバイス・ミクサ |
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JP7409896B2 (ja) | 2024-01-09 |
JP2024019657A (ja) | 2024-02-09 |
US20210234086A1 (en) | 2021-07-29 |
KR20210095784A (ko) | 2021-08-03 |
US11302856B2 (en) | 2022-04-12 |
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