公开(公告)号：US20210377048A1

公开(公告)日：2021-12-02

申请号：US17366679

申请日：2021-07-02

Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.

Inventor： Yuao CHEN ,  Runyao DUAN ,  Lijing JIN

IPC: H04L9/32 ,  H04L9/08

Abstract: This application discloses a digital signature method, a signature information verification method, a related apparatus and an electronic device, and relates to the field of information security in quantum computing. The digital signature method includes: acquiring a to-be-sent file and a private key used by a first electronic device for digital signature, where the private key includes a first invertible matrix; generating, based on a randomly generated second invertible matrix and a first tensor, a second tensor isomorphic to the first tensor; using a hash function to digitally sign the to-be-sent file based on the second tensor, to obtain a first character string; generating, based on the first character string, the first invertible matrix and the second invertible matrix, signature information provided by the first electronic device for the to-be-sent file.

公开(公告)号：US20210209498A1

公开(公告)日：2021-07-08

申请号：US17209031

申请日：2021-03-22

Applicant: Beijing Baidu Netcom Science and Technology Co., LTD.

Inventor： Lijing JIN ,  Runyao DUAN

IPC: G06N10/00 ,  H01L39/02 ,  H01L39/22

Abstract: The present disclosure discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer, which relate to the field of quantum computation. The specific implementation is as follows: computation qubits; a coupling device configured to be coupled with two computation qubits, respectively; a connecting component disposed between a computation qubit and the coupling device to couple the computation qubit with the coupling device, so as to implement a target quantum gate based on the coupling device and the computation qubit.

公开(公告)号：US20210232964A1

公开(公告)日：2021-07-29

申请号：US17210950

申请日：2021-03-24

Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.

Inventor： Lijing JIN ,  Runyao DUAN

IPC: G06N10/00

Abstract: The present application discloses a method and apparatus for evaluating a quantum gate in a superconducting circuit, a device and a storage medium, which relate to the field of quantum computations. The specific scheme may include: acquiring a Hamiltonian corresponding to a superconducting circuit structure, wherein the superconducting circuit structure may include computation qubits and a coupler disposed between two of the computation qubits and coupled with the two of the computation qubits respectively; performing decoupling processing for the coupler on the Hamiltonian to obtain the processed Hamiltonian representing a coupling strength between the computation qubits; and obtaining, based on the processed Hamiltonian, a first data processing rule that takes circuit parameters of the superconducting circuit structure as input parameters, wherein a degree of a difference between a target quantum gate and a theoretical quantum gate can be obtained based on the first data processing rule.