公开(公告)号：EP4250901A3

公开(公告)日：2024-04-10

申请号：EP23185781.4

申请日：2019-10-31

Applicant: Japan Science and Technology Agency

Inventor： NAKAMURA, Yasunobu ,  TABUCHI, Yutaka ,  TAMATE, Shuhei

IPC: G06N10/40 ,  H10N69/00 ,  H10N60/80 ,  H01L23/492

Abstract: A superconducting complex quantum computing circuit includes a circuit substrate in which a wiring pattern of a circuit element, which includes a quantum bit and an observation electrode for observing a state of the quantum bit, and a ground pattern which is at a ground potential are formed on a substrate surface, and that includes a through-electrode which connects the ground pattern formed on a first surface of the substrate surface and the ground pattern formed on a second surface, which is a surface opposite the first surface, inside the substrate; a first ground electrode that includes a first contact portion which is in contact with the ground pattern formed on the first surface of the circuit substrate, and a first non-contact portion which has a shape corresponding to a shape of the wiring pattern formed on the first surface; a second ground electrode that includes a second contact portion which is in contact with the ground pattern formed on the second surface of the circuit substrate; a control signal line that is provided with a contact spring pin at a tip, the pin being in contact with a position corresponding to the quantum bit to press the first surface of the circuit substrate against the first ground electrode or to press the second surface of the circuit substrate against the second ground electrode; and a pressing member that presses the first ground electrode against the first surface of the circuit substrate or presses the second ground electrode against the second surface of the circuit substrate, in which the first ground electrode is in contact with the ground pattern via a first extension portion formed by a superconductor having extensibility higher than extensibility of the ground pattern, and the second ground electrode is in contact with the ground pattern via a second extension portion formed by a superconductor having extensibility higher than the extensibility of the ground pattern.

公开(公告)号：EP4250901A2

公开(公告)日：2023-09-27

申请号：EP23185781.4

申请日：2019-10-31

Applicant: Japan Science and Technology Agency

Inventor： NAKAMURA, Yasunobu ,  TABUCHI, Yutaka ,  TAMATE, Shuhei

IPC: H10N69/00

Abstract: A superconducting complex quantum computing circuit includes a circuit substrate in which a wiring pattern of a circuit element, which includes a quantum bit and an observation electrode for observing a state of the quantum bit, and a ground pattern which is at a ground potential are formed on a substrate surface, and that includes a through-electrode which connects the ground pattern formed on a first surface of the substrate surface and the ground pattern formed on a second surface, which is a surface opposite the first surface, inside the substrate; a first ground electrode that includes a first contact portion which is in contact with the ground pattern formed on the first surface of the circuit substrate, and a first non-contact portion which has a shape corresponding to a shape of the wiring pattern formed on the first surface; a second ground electrode that includes a second contact portion which is in contact with the ground pattern formed on the second surface of the circuit substrate; a control signal line that is provided with a contact spring pin at a tip, the pin being in contact with a position corresponding to the quantum bit to press the first surface of the circuit substrate against the first ground electrode or to press the second surface of the circuit substrate against the second ground electrode; and a pressing member that presses the first ground electrode against the first surface of the circuit substrate or presses the second ground electrode against the second surface of the circuit substrate, in which the first ground electrode is in contact with the ground pattern via a first extension portion formed by a superconductor having extensibility higher than extensibility of the ground pattern, and the second ground electrode is in contact with the ground pattern via a second extension portion formed by a superconductor having extensibility higher than the extensibility of the ground pattern.

公开(公告)号：EP3866213A1

公开(公告)日：2021-08-18

申请号：EP19870463.7

申请日：2019-10-31

Applicant: Japan Science and Technology Agency

Inventor： NAKAMURA, Yasunobu ,  TABUCHI, Yutaka ,  TAMATE, Shuhei

IPC: H01L39/02 ,  H01L39/22

Abstract: A superconducting complex quantum computing circuit includes a circuit substrate in which a wiring pattern of a circuit element, which includes a quantum bit and an observation electrode for observing a state of the quantum bit, and a ground pattern which is at a ground potential are formed on a substrate surface, and that includes a through-electrode which connects the ground pattern formed on a first surface of the substrate surface and the ground pattern formed on a second surface, which is a surface opposite the first surface, inside the substrate; a first ground electrode that includes a first contact portion which is in contact with the ground pattern formed on the first surface of the circuit substrate, and a first non-contact portion which has a shape corresponding to a shape of the wiring pattern formed on the first surface; a second ground electrode that includes a second contact portion which is in contact with the ground pattern formed on the second surface of the circuit substrate; a control signal line that is provided with a contact spring pin at a tip, the pin being in contact with a position corresponding to the quantum bit to press the first surface of the circuit substrate against the first ground electrode or to press the second surface of the circuit substrate against the second ground electrode; and a pressing member that presses the first ground electrode against the first surface of the circuit substrate or presses the second ground electrode against the second surface of the circuit substrate, in which the first ground electrode is in contact with the ground pattern via a first extension portion formed by a superconductor having extensibility higher than extensibility of the ground pattern, and the second ground electrode is in contact with the ground pattern via a second extension portion formed by a superconductor having extensibility higher than the extensibility of the ground pattern.