Patents by Inventor Lijing Jin

Lijing Jin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220131707
    Abstract: A digital signature method, a signature information verification method, a related apparatus and an electronic device are provided. The digital signature method includes: obtaining a to-be-sent file and a private key used by a first electronic device for digital signature, the private key including a first invertible matrix; generating L second tensors based on the first invertible matrix and a first tensor, the L second tensors including the first tensor and a tensor isomorphic to the first tensor; digitally signing the to-be-sent file based on a second invertible matrix and the first tensor, to obtain a first character string; constructing a hash value of a root node of a hash tree based on the L second tensors; generating signature information of the to-be-sent file based on the first character string, the first invertible matrix, the second invertible matrix, the L second tensors and the hash value of the root node.
    Type: Application
    Filed: January 7, 2022
    Publication date: April 28, 2022
    Inventors: Yuao CHEN, Runyao DUAN, Lijing JIN
  • Publication number: 20220076154
    Abstract: A control pulse generation method, a system, a device and a storage medium are provided, which are related to the field of quantum computing. The method includes: acquiring a system Hamiltonian; acquiring an initial control pulse of a quantum logic gate included in a parameterized quantum circuit to obtain an initial pulse sequence for a gate sequence formed for all the quantum logic gates in the parameterized quantum circuit, which is obtained through simulation based on the system Hamiltonian; acquiring system state information of the quantum system obtained after applying the initial pulse sequence to the target quantum hardware device; adjusting a parameter of the parameterized quantum circuit based on a relationship between the system state information and target state information needed to be achieved by the target quantum control task, to adjust a pulse parameter of the initial pulse sequence to obtain a target pulse sequence.
    Type: Application
    Filed: November 15, 2021
    Publication date: March 10, 2022
    Inventors: Xin WANG, Lijing JIN, Shusen LIU, Zelin MENG, Zixian YAN
  • Publication number: 20220044143
    Abstract: A simulation method in quantum control is provided, which is related to a field of quantum control. The specific implementation scheme includes: acquiring a hardware parameter corresponding to a quantum system and a target quantum gate required to be realized by the quantum system; acquiring a pulse function represented on the basis of discrete time slices; determining target step sizes corresponding to the discrete time slices in the pulse function, to obtain pulse parameter values within time durations corresponding to the target step sizes corresponding to the time slices and the pulse function; and obtaining simulation quantum gates within the time durations corresponding to the target step sizes on the basis of obtained pulse parameter values within the time durations corresponding to the target step sizes and the hardware parameter of the quantum system, until obtaining a target simulation quantum gate within a preset pulse time duration.
    Type: Application
    Filed: October 18, 2021
    Publication date: February 10, 2022
    Inventors: Lijing Jin, Xin Wang, Zelin Meng
  • Publication number: 20220027774
    Abstract: A quantum control pulse generation method, a device, and a storage medium are provided, which are related to the field of quantum computation. The method includes: constructing, based on relevant physical parameters of a target quantum hardware structure, a system Hamiltonian of a quantum system characterized by the target quantum hardware structure; obtaining an initial control pulse set matching the target quantum hardware structure; obtaining, based on the system Hamiltonian, system state information of the quantum system by simulation; and optimizing the initial control pulse in the initial control pulse set based on at least a relationship between the system state information of the quantum system and target state information that needs to be achieved by the target quantum task, to obtain a target control pulse sequence by simulation.
    Type: Application
    Filed: October 6, 2021
    Publication date: January 27, 2022
    Inventors: Lijing JIN, Xin WANG, Runze ZHANG, Zelin MENG
  • Publication number: 20210377048
    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.
    Type: Application
    Filed: July 2, 2021
    Publication date: December 2, 2021
    Inventors: Yuao CHEN, Runyao DUAN, Lijing JIN
  • Publication number: 20210326737
    Abstract: The present disclosure provides superconducting circuit architecture, a superconducting quantum chip, and a superconducting quantum computer including a plurality of coupling devices. The superconducting circuit architecture includes: a first qubit and a second qubit, and a first coupling device and a second coupling device. The first coupling device is coupled to the first qubit and the second qubit through a first connector, and the second coupling device is coupled to the first qubit and the second qubit through a second connector. The frequencies of the first qubit and the second qubit are between a frequency of the first coupling device and a frequency of the second coupling device, and a nonlinear strength of the first coupling device and a nonlinear strength of the second coupling device are opposite in sign.
    Type: Application
    Filed: September 29, 2020
    Publication date: October 21, 2021
    Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.
    Inventors: Lijing Jin, Runyao Duan
  • Publication number: 20210232964
    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.
    Type: Application
    Filed: March 24, 2021
    Publication date: July 29, 2021
    Applicant: Beijing Baidu Netcom Science and Technology Co., Ltd.
    Inventors: Lijing JIN, Runyao DUAN
  • Publication number: 20210209498
    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.
    Type: Application
    Filed: March 22, 2021
    Publication date: July 8, 2021
    Inventors: Lijing JIN, Runyao DUAN
  • Publication number: 20210192380
    Abstract: A superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer are provided, which are related to a field of quantum computing. The specific implementation includes: a superconducting circuit structure, including: at least three computational qubits; a bus qubit connected to the respective computational qubits, wherein couplings between two of the computational qubits connected by the bus qubit are equivalent; and coupler qubits disposed between the respective computational qubits and the bus qubit, to connect the respective computational qubits to the bus qubits, wherein the coupler qubit is configured to regulate coupling strength between the computational qubit and the bus qubit. Couplings between any two computational qubits may be realized, so that an operation of a quantum gate between any two computational qubits is achieved, while crosstalk between computational qubits may be effectively suppressed.
    Type: Application
    Filed: September 16, 2020
    Publication date: June 24, 2021
    Inventors: Lijing Jin, Runyao Duan
  • Publication number: 20210110290
    Abstract: A superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer are provided, which relate to the field of quantum computing. The superconducting circuit structure includes: at least two qubits; a connector, coupled with the two qubits respectively, to realize transversal coupling with each of the two qubits; and a coupler, coupled with the two qubits respectively, to realize longitudinal coupling with each of the two qubits. Therefore, the ?z?z parasitic coupling between the qubits is effectively removed, and a two-qubit gate with high fidelity is obtained.
    Type: Application
    Filed: September 14, 2020
    Publication date: April 15, 2021
    Inventors: Lijing Jin, Runyao Duan