公开(公告)号：US20240016068A1

公开(公告)日：2024-01-11

申请号：US18341092

申请日：2023-06-26

Applicant: NEC Corporation ,  NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY

Inventor： Yohei KAWAKAMI ,  Yoshiro URADE ,  Yoshihito HASHIMOTO ,  Tsuyoshi YAMAMOTO

IPC: H10N60/12 ,  H10N60/80 ,  G06N10/40

CPC classification number: H10N60/12 ,  H10N60/805 ,  G06N10/40

Abstract: A superconducting quantum circuit includes: a first resonator having a superconducting quantum interference device and a capacitor that forms a closed loop together with the superconducting quantum interference device; and a control line being connected to a first control port and magnetically coupled to the superconducting quantum interference device, wherein the control line includes at least a first line having a characteristic impedance that indicates a first impedance value, and a second line being provided closer to a portion magnetically coupled to the superconducting quantum interference device than the first line and having a characteristic impedance that indicates a second impedance value being different from the first impedance value.

公开(公告)号：US20220377880A1

公开(公告)日：2022-11-24

申请号：US17746212

申请日：2022-05-17

Applicant: NEC Corporation

Inventor： Yoshihito HASHIMOTO ,  Tsuyoshi YAMAMOTO ,  Kohei MATSUURA

IPC: H05K1/02 ,  H05K1/18 ,  H05K1/11

Abstract: A sample holder includes a base comprising a support structure and a printed circuit board (PCB) in contact with the base. The PCB has a through hole. The PCB has a cavity in at least a part of the base below the through hole. The support structure that supports a surface of a chip and is electrically connected to the base. The support structure is disposed in the cavity. At least a part of the section supporting the chip in the support structure is not parallel to the back surface of the chip.

公开(公告)号：US20220231216A1

公开(公告)日：2022-07-21

申请号：US17619381

申请日：2020-03-16

Applicant: NEC Corporation

Inventor： Tomohiro YAMAJI ,  Tsuyoshi YAMAMOTO

IPC: H01L39/24 ,  H01L39/22 ,  H01L39/02 ,  H01L27/18

Abstract: A circuit manufacturing method according to the present disclosure is a circuit manufacturing method by deposition, comprising performing first deposition for forming a first superconductor layer, oxidizing a surface of the first superconductor layer to form an oxide film, performing second deposition for forming a second superconductor layer, whereby a circuit in which Josephson junctions are aligned is generated. A mask includes two opening parts and an odd number of first-type opening parts. The width of a first-type opening part has such a length that the area of a Josephson junction formed based on the first superconductor layer and the second superconductor layer derived from the first-type opening part becomes larger than the area of a Josephson junction formed based on the first superconductor layer and the second superconductor layer derived from the two opening parts that are adjacent to each other.

公开(公告)号：US20230276717A1

公开(公告)日：2023-08-31

申请号：US18007765

申请日：2020-06-05

Applicant: NEC Corporation

Inventor： Akira MIYATA ,  Katsumi KIKUCHI ,  Suguru WATANABE ,  Takanori NISHI ,  Hideyuki SATOU ,  Tomohiro YAMAJI ,  Tsuyoshi YAMAMOTO ,  Yoshihito HASHIMOTO

IPC: H10N60/10 ,  G06N10/40

CPC classification number: H10N60/10 ,  G06N10/40

Abstract: Provided are an oscillator and a quantum computer capable of suppressing an occupied area of a circuit. An oscillator (300) includes a resonator (100) including a plurality of loop circuits in which a first superconducting line (112a), a first Josephson junction (111a), a second superconducting line (112b), and a second Josephson junction (111b) are annularly connected, and a magnetic field application circuit (200) including an electrode that goes around in a predetermined shape and configured to apply a magnetic field to the loop circuit, in which the electrode is arranged so as to face at least two of the loop circuits.

公开(公告)号：US20220263468A1

公开(公告)日：2022-08-18

申请号：US17626576

申请日：2020-06-26

Applicant: NEC Corporation

Inventor： Tsuyoshi YAMAMOTO ,  Yoshihito HASHIMOTO

IPC: H03B15/00 ,  G06N10/00

Abstract: An oscillation apparatus includes: an oscillator including a resonator and a magnetic-field generating unit, the resonator including a loop circuit and a capacitor, the loop circuit including a first superconducting line, a first Josephson junction, a second superconducting line, and a second Josephson junction connected in a ring shape, the magnetic-field generating unit being configured to apply a magnetic field to the loop circuit, and the oscillator being configured to perform parametric oscillation; a read-out unit for reading out an internal state of the oscillator; and a filter configured to restrict transmission of a signal in a predetermined frequency band. A circuit in which the capacitor and the loop circuit are connected in a ring shape is connected to the read-out unit through the filter.