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公开(公告)号：US12086684B2
公开(公告)日：2024-09-10
申请号：US17201510
申请日：2021-03-15
申请人： Google LLC
CPC分类号： G06N10/00 , G06F13/4068 , H01P3/003 , H10N60/805
摘要： A qubit device includes an elongated thin film uninterrupted by Josephson junctions, a quantum device in electrical contact with a proximal end of the elongated thin film, and a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film, in which the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
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公开(公告)号：US20220027773A1
公开(公告)日：2022-01-27
申请号：US17433445
申请日：2019-03-05
申请人： Google LLC
IPC分类号： G06N10/00
摘要： Methods, systems and apparatus for generating plunge schedules for implementing iSWAP quantum logic gates between a first qubit and a second qubit. In one aspect, a plunge schedule that defines a trajectory of a detuning between a frequency of the first qubit and a frequency of the second qubit includes, during a first stage, non-adiabatically driving detuning between the frequency of the first qubit and the frequency of the second qubit through a first avoided crossing in a leakage channel, during a second stage, driving detuning between the frequency of the first qubit and the frequency of the second qubit through a second avoided crossing in a swap channel. during a third stage, allowing the first qubit and the second qubit to freely evolve and interact, during a fourth stage, implementing the second stage in reverse order, and during a fifth stage, implementing the first stage in reverse order.
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公开(公告)号：US11188843B2
公开(公告)日：2021-11-30
申请号：US16857955
申请日：2020-04-24
申请人： Google LLC
IPC分类号： H01P3/00 , G06N10/00 , G01R33/035
摘要： 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：US20210304054A1
公开(公告)日：2021-09-30
申请号：US17218690
申请日：2021-03-31
申请人： Google LLC
发明人： Charles James Neill , Vadim Smelyanskiy , Yu Chen , Xiao Mi , Yuezhen Niu , Kostyantyn Yevgenovych Kechedzhi , Alexander Nikolaevich Korotkov , Zhang Jiang
摘要： Systems and methods for composite quantum gate calibration for a quantum computing system are provided. In some implementations, a method includes accessing a unitary gate model describing a composite quantum gate. The unitary gate model includes a plurality of gate parameters. The method includes implementing the composite quantum gate for a plurality of gate cycles on the quantum system to amplify the plurality of gate parameters. The method includes obtaining a measurement of a state of the quantum system after implementing the composite quantum gate for the plurality of gate cycles. The method includes determining at least one of the plurality of gate parameters based at least in part on the measurement of the state of the quantum system. The method includes calibrating the composite quantum gate for the quantum computing system based at least in part on the plurality of gate parameters.
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公开(公告)号：US20200242503A1
公开(公告)日：2020-07-30
申请号：US16849363
申请日：2020-04-15
申请人： Google LLC
摘要： A qubit device includes an elongated thin film uninterrupted by Josephson junctions, a quantum device in electrical contact with a proximal end of the elongated thin film, and a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film, in which the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
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公开(公告)号：US10528887B2
公开(公告)日：2020-01-07
申请号：US16270739
申请日：2019-02-08
申请人： Google LLC
发明人： Yu Chen , Dvir Kafri
IPC分类号： H01L27/18 , G06N10/00 , H01L39/22 , H01P3/00 , H01P5/02 , H05K1/11 , H05K1/18 , G06N20/00 , G06N99/00
摘要： A device includes: a first qubit including a first co-planar waveguide; a second qubit including a second co-planar waveguide, in which the second co-planar waveguide crosses the first co-planar waveguide; and a qubit coupler including a loop having a first lobe and a second lobe, in which a first portion of the first lobe extends parallel to the first co-planar waveguide, a second portion of the first lobe extends parallel to the second co-planar waveguide, a first portion of the second lobe extends parallel to the first co-planar waveguide, and a second portion of the second lobe extends parallel to the second co-planar waveguide.
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公开(公告)号：US10235634B1
公开(公告)日：2019-03-19
申请号：US15686902
申请日：2017-08-25
申请人： Google LLC
发明人： Yu Chen , Dvir Kafri
摘要： A device includes: a first qubit including a first co-planar waveguide; a second qubit including a second co-planar waveguide, in which the second co-planar waveguide crosses the first co-planar waveguide; and a qubit coupler including a loop having a first lobe and a second lobe, in which a first portion of the first lobe extends parallel to the first co-planar waveguide, a second portion of the first lobe extends parallel to the second co-planar waveguide, a first portion of the second lobe extends parallel to the first co-planar waveguide, and a second portion of the second lobe extends parallel to the second co-planar waveguide.
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公开(公告)号：US20210256412A1
公开(公告)日：2021-08-19
申请号：US17201510
申请日：2021-03-15
申请人： Google LLC
摘要： A qubit device includes an elongated thin film uninterrupted by Josephson junctions, a quantum device in electrical contact with a proximal end of the elongated thin film, and a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film, in which the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
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公开(公告)号：US10949769B2
公开(公告)日：2021-03-16
申请号：US16849363
申请日：2020-04-15
申请人： Google LLC
摘要： A qubit device includes an elongated thin film uninterrupted by Josephson junctions, a quantum device in electrical contact with a proximal end of the elongated thin film, and a ground plane that is co-planar with the elongated thin film and is in electrical contact with a distal end of the elongated thin film, in which the thin film, the quantum device, and the ground plane comprise a material that is superconducting at a designed operating temperature.
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公开(公告)号：US10832156B2
公开(公告)日：2020-11-10
申请号：US16096110
申请日：2016-12-30
申请人： Google LLC
摘要： 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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