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公开(公告)号：US20220012622A1
公开(公告)日：2022-01-13
申请号：US17339276
申请日：2021-06-04
Applicant: Google LLC
Inventor： Yuezhen Niu , Hartmut Neven , Vadim Smelyanskiy , Sergio Boixo Castrillo
Abstract: Methods, systems, and apparatus for implementing a unitary quantum gate on one or more qubits. In one aspect, a method includes the actions designing a control pulse for the unitary quantum gate, comprising: defining a universal quantum control cost function, wherein the control cost function comprises a qubit leakage penalty term representing i) coherent qubit leakage, and ii) incoherent qubit leakage across all frequency components during a time dependent Hamiltonian evolution that realizes the unitary quantum gate; adjusting parameters of the time dependent Hamiltonian evolution to vary a control cost according to the control cost function such that leakage errors are reduced; generating the control pulse using the adjusted parameters; and applying the control pulse to the one or more qubits to implement the unitary quantum gate.
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公开(公告)号：US11030548B1
公开(公告)日：2021-06-08
申请号：US16413273
申请日：2019-05-15
Applicant: Google LLC
Inventor： Nan Ding , Masoud Mohseni , Hartmut Neven
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for using a quantum oracle to make inference in complex machine learning models that is capable of solving artificial intelligent problems. Input to the quantum oracle is derived from the training data and the model parameters, which maps at least part of the interactions of interconnected units of the model to the interactions of qubits in the quantum oracle. The output of the quantum oracle is used to determine values used to compute loss function values or loss function gradient values or both during a training process.
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公开(公告)号：US10922619B2
公开(公告)日：2021-02-16
申请号：US16997673
申请日：2020-08-19
Applicant: Google LLC
Inventor： Masoud Mohseni , Hartmut Neven
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for constructing and programming quantum hardware for quantum annealing processes.
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公开(公告)号：US10915832B2
公开(公告)日：2021-02-09
申请号：US16841251
申请日：2020-04-06
Applicant: Google LLC
Inventor： Masoud Mohseni , Hartmut Neven
Abstract: Among other things, an apparatus comprises quantum units; and couplers among the quantum units. Each coupler is configured to couple a pair of quantum units according to a quantum Hamiltonian characterizing the quantum units and the couplers. The quantum Hamiltonian includes quantum annealer Hamiltonian and a quantum governor Hamiltonian. The quantum annealer Hamiltonian includes information bearing degrees of freedom. The quantum governor Hamiltonian includes non-information bearing degrees of freedom that are engineered to steer the dissipative dynamics of information bearing degrees of freedom.
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公开(公告)号：US20210035005A1
公开(公告)日：2021-02-04
申请号：US16624037
申请日：2017-12-15
Applicant: Google LLC
Inventor： John Martinis , Yu Chen , Hartmut Neven , Dvir Kafri
Abstract: Methods, systems, and apparatus for nonlinear calibration of quantum computing apparatus. In one aspect, elements in a set of experimental data correspond to a respective configuration of control biases for the quantum computing apparatus. An initial physical model comprising one or more model parameters of the quantum computing apparatus is defined. The model is iteratively adjusted to determine a revised physical model, where at each iteration: a set of predictive data corresponding to the set of experimental data is generated, and elements in the predictive data represent a difference between the two smallest eigenvalues of a Hamiltonian characterizing the system qubits for the previous iteration, and are dependent on at least one model parameter of the physical model for the previous iteration; and the model for the previous iteration is adjusted using the obtained experimental data and the generated set of predictive data for the iteration.
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Patent Agency Ranking
公开(公告)号：US20210004709A1
公开(公告)日：2021-01-07
申请号：US16997673
申请日：2020-08-19
Applicant: Google LLC
Inventor： Masoud Mohseni , Hartmut Neven
Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for constructing and programming quantum hardware for quantum annealing processes.
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公开(公告)号：US20200250570A1
公开(公告)日：2020-08-06
申请号：US16857955
申请日：2020-04-24
Applicant: Google LLC
Inventor： Alireza Shabani Barzegar , Pedram Roushan , Yu Chen , Hartmut Neven
IPC: G06N10/00 , G01R33/035 , H01P3/00
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.
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公开(公告)号：US20200234175A1
公开(公告)日：2020-07-23
申请号：US16841251
申请日：2020-04-06
Applicant: Google LLC
Inventor： Masoud Mohseni , Hartmut Neven
Abstract: Among other things, an apparatus comprises quantum units; and couplers among the quantum units. Each coupler is configured to couple a pair of quantum units according to a quantum Hamiltonian characterizing the quantum units and the couplers. The quantum Hamiltonian includes quantum annealer Hamiltonian and a quantum governor Hamiltonian. The quantum annealer Hamiltonian includes information bearing degrees of freedom. The quantum governor Hamiltonian includes non-information bearing degrees of freedom that are engineered to steer the dissipative dynamics of information bearing degrees of freedom.
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公开(公告)号：US20190164059A1
公开(公告)日：2019-05-30
申请号：US16096237
申请日：2016-12-30
Applicant: Google LLC
Inventor： Vasil S. Denchev , Masoud Mohseni , Hartmut Neven
Abstract: Methods and apparatus for quantum assisted optimization. In one aspect, a method includes obtaining a set of initial input states, applying one or more of (i) dynamical thermal fluctuations and (ii) cluster update algorithms to the set of input states and subsequent input states when the states evolve within the classical information processors, applying dynamical quantum fluctuations to the set of input states and subsequent states when the states evolve within the quantum systems and repeating the application steps until a desirable output state is obtained.
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公开(公告)号：US20190147359A1
公开(公告)日：2019-05-16
申请号：US16096110
申请日：2016-12-30
Applicant: Google LLC
Inventor： Yu Chen , Hartmut Neven , Austin Greig Fowler , Alireza Shabani Barzegar
CPC classification number: G06N10/00 , H01L39/025 , H01P3/003 , H01P7/086
Abstract: A quantum computing device includes: a first array of qubits arranged along a first axis; and a second array of qubits arranged along a second axis different from the first axis so that the qubits of the second array intersect with the qubits of the first array to form a lattice structure, in which each qubit in the first array is offset along the second axis relative to a directly adjacent qubit in the first array, each qubit in the second array is offset along the first axis relative to a directly adjacent qubit in the second array, and each intersection between a qubit from the first array and a qubit from the second array in the lattice structure comprises a coupler arranged to inductively couple the qubit from the first array to the qubit from the second array.
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