Programmable universal quantum annealing with co-planar waveguide flux qubits

    公开(公告)号:US11188843B2

    公开(公告)日:2021-11-30

    申请号:US16857955

    申请日:2020-04-24

    Applicant: Google LLC

    Abstract: A quantum computing device includes multiple co-planar waveguide flux qubits, at least one coupler element arranged such that each co-planar waveguide flux qubit, of the multiple co-planar waveguide flux qubits, is operatively couplable to each other co-planar waveguide flux qubit, of the multiple co-planar waveguide flux qubits, of the quantum computing device, and a tuning quantum device, in which the tuning quantum device is in electrical contact with a first co-planar waveguide flux qubit of the plurality of co-planar waveguide flux qubits and with a second co-planar waveguide flux qubit of the plurality of co-planar waveguide flux qubits.

    INHOMOGENEOUS QUANTUM ANNEALING SCHEDULES
    43.
    发明申请

    公开(公告)号:US20200334564A1

    公开(公告)日:2020-10-22

    申请号:US16957668

    申请日:2018-12-28

    Applicant: Google LLC

    Abstract: Methods and apparatus for performing quantum annealing using a quantum system. In one aspect, a method includes controlling the quantum system such that a total Hamiltonian characterizing the quantum system evolves from an initial quantum Hamiltonian to a problem quantum Hamiltonian, wherein controlling the quantum system comprises applying an inhomogeneous driving field to the quantum system to drive the quantum system across a quantum phase transition.

    SIMULATING MATERIALS USING QUANTUM COMPUTATION

    公开(公告)号:US20200065439A1

    公开(公告)日:2020-02-27

    申请号:US16344112

    申请日:2016-11-10

    Applicant: Google LLC

    Abstract: Methods, systems, and apparatus for quantum simulation of materials. In one aspect, a method includes the actions of determining a physical system of interest, wherein the physical system comprises a plurality of unit cells; performing a quantum computation to approximate a ground state of the physical system in a region of one of the unit cells; and providing the approximated ground state of the physical system in the region of the unit cell as output.

    TRAINING QUANTUM EVOLUTIONS USING SUBLOGICAL CONTROLS

    公开(公告)号:US20190213495A1

    公开(公告)日:2019-07-11

    申请号:US16355293

    申请日:2019-03-15

    Applicant: Google LLC

    CPC classification number: G06N10/00 B82Y10/00 G06N20/00

    Abstract: Methods, systems, and apparatus for training quantum evolutions using sub-logical controls. In one aspect, a method includes the actions of accessing quantum hardware, wherein the quantum hardware includes a quantum system comprising one or more multi-level quantum subsystems; one or more control devices that operate on the one or more multi-level quantum subsystems according to one or more respective control parameters that relate to a parameter of a physical environment in which the multi-level quantum subsystems are located; initializing the quantum system in an initial quantum state, wherein an initial set of control parameters form a parameterization that defines the initial quantum state; obtaining one or more quantum system observables and one or more target quantum states; and iteratively training until an occurrence of a completion event.

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