Title:
SUPERCONDUCTING QUANTUM CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2023/188041
Kind Code:
A1
Abstract:
This superconducting quantum circuit is provided with a coupler (21) that couples a first through fourth quantum bits (20A to 20D) by a four-body interaction, the coupler comprising first and second electrodes (16, 18) and a Josephson junction (10) cross-linking the first and second electrodes. The first through fourth quantum bits comprise a resonator including a loop circuit (210A to 210D) and a capacitor (206A to 206D) connected in parallel to the loop circuit. In the loop circuit (210A to 210D), a first superconducting line (203A to 203D), a first Josephson junction (201A to 201D), a second superconducting line (204A to 204D), and a second Josephson junction (202A to 202D) are connected in a ring. The first and second quantum bits are capacitively coupled to the first electrode, and the third and fourth quantum bits are capacitively coupled to the second electrode. The capacitance C of the capacitive coupling between the first through fourth quantum bits and the coupler, the capacitance CJ of the capacitor connected in parallel to the first through fourth quantum bits, and the capacitance Cg between the first and second electrodes of the coupler are set to CJ>Cg>C.
Inventors:
MIYAZAKI RYOJI (JP)
YAMAGUCHI AIKO (JP)
YAMAJI TOMOHIRO (JP)
YAMAGUCHI AIKO (JP)
YAMAJI TOMOHIRO (JP)
Application Number:
PCT/JP2022/015706
Publication Date:
October 05, 2023
Filing Date:
March 29, 2022
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H01L39/22
Domestic Patent References:
| WO2021014891A1 | 2021-01-28 | |||
| WO2021014885A1 | 2021-01-28 |
Foreign References:
| US20180341874A1 | 2018-11-29 |
Other References:
PURI SHRUTI, ANDERSEN CHRISTIAN KRAGLUND, GRIMSMO ARNE L., BLAIS ALEXANDRE: "Quantum annealing with all-to-all connected nonlinear oscillators", NATURE COMMUNICATIONS, vol. 8, no. 1, XP093096412, DOI: 10.1038/ncomms15785
ZHAO PENG, JIN ZHENCHUAN, XU PENG, TAN XINSHENG, YU HAIFENG, YU YANG: "Two-Photon Driven Kerr Resonator for Quantum Annealing with Three-Dimensional Circuit QED", PHYSICAL REVIEW APPLIED, vol. 10, no. 2, 1 August 2018 (2018-08-01), XP093096413, DOI: 10.1103/PhysRevApplied.10.024019
ZHAO PENG, JIN ZHENCHUAN, XU PENG, TAN XINSHENG, YU HAIFENG, YU YANG: "Two-Photon Driven Kerr Resonator for Quantum Annealing with Three-Dimensional Circuit QED", PHYSICAL REVIEW APPLIED, vol. 10, no. 2, 1 August 2018 (2018-08-01), XP093096413, DOI: 10.1103/PhysRevApplied.10.024019
Attorney, Agent or Firm:
KATO, Asamichi (JP)
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