公开(公告)号：US20220261680A1

公开(公告)日：2022-08-18

申请号：US17626967

申请日：2020-06-26

Applicant: NEC Corporation

Inventor： Masahiro HASEGAWA ,  Tsuyoshi YAMAMOTO ,  Yoshihoto HASHIMOTO

IPC: G06N10/40 ,  H01L27/18 ,  H03K17/92

Abstract: A superconducting circuit and a quantum computer capable of implementing four-body interaction while reducing an amount of hardware are provided. A superconducting circuit (1) includes four superconducting qubit circuits (10), a coupling circuit (20) inductively coupled to the four superconducting qubit circuits (10). Each of the superconducting qubit circuits (10) indicates a qubit by being in a first phase state or a second phase state, when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an even number, an interaction term of Hamiltonian of the superconducting circuit (1) takes a first value, and when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an odd number, the interaction term takes a second value.

公开(公告)号：US20220318660A1

公开(公告)日：2022-10-06

申请号：US17626971

申请日：2020-06-26

Applicant: NEC Corporation

Inventor： Masahiro HASEGAWA ,  Tsuyoshi YAMAMOTO ,  Yoshihito HASHIMOTO

IPC: G06N10/40 ,  H01L27/18 ,  H01L39/22

Abstract: A superconducting circuit and a quantum computer capable of implementing four-body interaction using a plurality of superconducting qubit circuits supplied with signals of the same frequency are provided. A superconducting circuit (1) includes four superconducting qubit circuits (10), a coupling circuit (20) directly connected to the four superconducting qubit circuits (10). Each of the superconducting qubit circuits (10) indicates a qubit by being in a first phase state or a second phase state, when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an even number, an interaction term of Hamiltonian of the superconducting circuit (1) takes a first value, and when the number of the superconducting qubit circuits (10) in the first phase state among the four superconducting qubit circuits (10) is an odd number, the interaction term takes a second value.