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公开(公告)号：US11562280B2
公开(公告)日：2023-01-24
申请号：US16636522
申请日：2017-08-09
Applicant: Google LLC
Inventor： John Martinis , Rami Barends , Austin Greig Fowler
IPC: G06N10/00 , H03K19/177
Abstract: Methods and systems for performing a surface code error detection cycle. In one aspect, a method includes initializing and applying Hadamard gates to multiple measurement qubits; performing entangling operations on a first set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a first direction; performing entangling operations on a second set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a second or third direction, the second and third direction being perpendicular to the first direction, the second direction being opposite to the third direction; performing entangling operations on a third set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a fourth direction, the fourth direction being opposite to the first direction; applying Hadamard gates to the measurement qubits; and measuring the measurement qubits.
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公开(公告)号：US11557709B2
公开(公告)日：2023-01-17
申请号：US16616733
申请日：2017-09-07
Applicant: Google LLC
Inventor： John Martinis
Abstract: The subject matter of the present disclosure may be embodied in devices, such as flexible wiring, that include: an elongated flexible substrate; multiple electrically conductive traces arranged in an array on a first side of the elongated flexible substrate; and an electromagnetic shielding layer on a second side of the elongated flexible substrate, the second side being opposite the first side, in which the elongated flexible substrate includes a fold region between a first electronically conductive trace and a second electrically conductive trace such that the electromagnetic shielding layer provides electromagnetic shielding between the first electronically conductive trace and the second electrically conductive trace.
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公开(公告)号：US20220085527A1
公开(公告)日：2022-03-17
申请号：US17476755
申请日：2021-09-16
Applicant: Google LLC
Inventor： John Martinis , Bob Benjamin Buckley , Xiaojun Trent Huang
Abstract: Interconnections for connecting flex circuit boards in classical and/or quantum computing systems can include a first flex circuit board having a removed portion that exposes one or more signal lines and a second flex circuit board having a removed portion that exposes one or more other signal lines. The flex circuit boards can be aligned at the removed portions to form a signal trace gap near the exposed signal lines. Exposed signal lines of the first flex circuit board can be coupled with exposed signal lines of the second flex circuit board. A ground support layer can be coupled to the first flex circuit board and the second flex circuit board along the same side. An isolation plate at least partially covering the signal trace gap can be coupled to the first flex circuit board and/or the second flex circuit board on a side opposite of the ground support layer.
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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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公开(公告)号：US10650320B2
公开(公告)日：2020-05-12
申请号：US15764021
申请日：2015-09-30
Applicant: GOOGLE LLC
Inventor： Yu Chen , John Martinis , Daniel Thomas Sank , Alireza Shabani Barzegar
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20250086489A1
公开(公告)日：2025-03-13
申请号：US18801092
申请日：2024-08-12
Applicant: Google LLC
Inventor： Yu Chen , John Martinis , Daniel Thomas Sank , Alireza Shabani Barzegar
Abstract: 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：US12229635B2
公开(公告)日：2025-02-18
申请号：US17574192
申请日：2022-01-12
Applicant: Google LLC
Inventor： John Martinis , Nan Ding , Ryan Babbush , Sergei V. Isakov , Hartmut Neven , Vadim Smelyanskiy , Sergio Boixo Castrillo
IPC: G06N10/00
Abstract: Methods and apparatus for estimating the fidelity of quantum hardware. In one aspect, a method includes accessing a set of quantum gates; sampling a subset of quantum gates from the set of quantum gates, wherein the subset of quantum gates defines a quantum circuit; applying the quantum circuit to a quantum system and performing measurements on the quantum system to determine output information of the quantum system; calculating output information of the quantum system based on application of the quantum circuit to the quantum system; and estimating a fidelity of the quantum circuit based on the determined output information and the calculated output information of the quantum system.
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公开(公告)号：US20240378473A1
公开(公告)日：2024-11-14
申请号：US18781756
申请日：2024-07-23
Applicant: Google LLC
Inventor： John Martinis , Rami Barends , Austin Greig Fowler
IPC: G06N10/00 , H03K19/177
Abstract: Methods and systems for performing a surface code error detection cycle. In one aspect, a method includes initializing and applying Hadamard gates to multiple measurement qubits; performing entangling operations on a first set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a first direction; performing entangling operations on a second set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a second or third direction, the second and third direction being perpendicular to the first direction, the second direction being opposite to the third direction; performing entangling operations on a third set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a fourth direction, the fourth direction being opposite to the first direction; applying Hadamard gates to the measurement qubits; and measuring the measurement qubits.
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公开(公告)号：US12056576B2
公开(公告)日：2024-08-06
申请号：US18202190
申请日：2023-05-25
Applicant: Google LLC
Inventor： John Martinis , Rami Barends , Austin Greig Fowler
Abstract: Methods, systems, and apparatus for operating a system of qubits. In one aspect, a method includes operating a first qubit from a first plurality of qubits at a first qubit frequency from a first qubit frequency region, and operating a second qubit from the first plurality of qubits at a second qubit frequency from a second first qubit frequency region, the second qubit frequency and the second first qubit frequency region being different to the first qubit frequency and the first qubit frequency region, respectively, wherein the second qubit is diagonal to the first qubit in a two-dimensional grid of qubits.
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公开(公告)号：US11763186B2
公开(公告)日：2023-09-19
申请号：US18095803
申请日：2023-01-11
Applicant: Google LLC
Inventor： John Martinis , Rami Barends , Austin Greig Fowler
IPC: G06N10/00 , H03K19/177
CPC classification number: G06N10/00 , H03K19/177
Abstract: Methods and systems for performing a surface code error detection cycle. In one aspect, a method includes initializing and applying Hadamard gates to multiple measurement qubits; performing entangling operations on a first set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a first direction; performing entangling operations on a second set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a second or third direction, the second and third direction being perpendicular to the first direction, the second direction being opposite to the third direction; performing entangling operations on a third set of paired qubits, wherein each pair comprises a measurement qubit coupled to a neighboring data qubit in a fourth direction, the fourth direction being opposite to the first direction; applying Hadamard gates to the measurement qubits; and measuring the measurement qubits.
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