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公开(公告)号：US12204990B2
公开(公告)日：2025-01-21
申请号：US18499879
申请日：2023-11-01
Applicant: Google LLC
Inventor： Ryan Babbush , Austin Greig Fowler
IPC: G06N10/00 , G06F15/16 , G06F30/20 , G06F30/337 , G06F30/373 , G06F30/398 , G06N10/20 , G06N10/40
Abstract: Methods, systems and apparatus for approximating a target quantum state that is defined as a result of applying a specific rotation operation to an initial quantum state. A method includes determining multiple configurations of T-gates. Each configuration of T-gates includes a number of T-gates that is less than or equal to a predefined total number of T-gates and represents a rotation operation that, when applied to the initial quantum state, produces an evolved quantum state that is an approximation of the target quantum state. A configuration of T-gates that represents a rotation operation with a rotation angle that is closest to a rotation angle of the specific rotation operation is selected from the multiple configurations of T-gates. A rotation operation represented by the selected configuration of T-gates is applied to the initial quantum state to obtain the approximation of the target quantum state.
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公开(公告)号：US20240086747A1
公开(公告)日：2024-03-14
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：US11909392B2
公开(公告)日：2024-02-20
申请号：US17296909
申请日：2019-11-27
Applicant: Google LLC
Inventor： Craig Gidney , Austin Greig Fowler
IPC: H03K19/003 , G06N10/00 , G06F8/20 , H03M13/00 , H03M13/29 , G06F11/00 , H03M13/03 , G06F111/10
CPC classification number: H03K19/003 , G06F8/20 , G06F11/004 , G06N10/00 , H03M13/033 , H03M13/2909 , H03M13/611 , G06F2111/10 , G06F2201/82
Abstract: Methods, systems, and apparatus for producing CCZ states and T states. In one aspect, a method for distilling a CCZ state includes preparing multiple target qubits, ancilla qubits and stabilizer qubits in a zero state, performing an X gate for each stabilizer qubit on multiple ancilla qubits or multiple ancilla qubits and one of the target qubits using the stabilizer qubit as a control, measuring the stabilizer qubits, performing, on each of the ancilla qubits, a Z1/4 gate and a Hadamard gate, measuring each of the ancilla qubits, performing, conditioned on each measured ancilla qubit state, a NOT operation on a selected stabilizer qubit, or a NOT operation on the selected stabilizer qubit and a Z gate on one or more respective target qubits, performing, on each target qubit and conditioned on a measured state of a respective stabilizer qubit, a Z gate on the target qubit, and performing an X gate on each of the target qubits.
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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：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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Patent Agency Ranking
公开(公告)号：US20240127103A1
公开(公告)日：2024-04-18
申请号：US18532394
申请日：2023-12-07
Applicant: Google LLC
Inventor： Craig Gidney , Austin Greig Fowler
IPC: G06N10/70 , G06F8/20 , G06F11/00 , G06N10/20 , G06N10/40 , H03K19/003 , H03M13/00 , H03M13/03 , H03M13/29
CPC classification number: G06N10/70 , G06F8/20 , G06F11/004 , G06N10/20 , G06N10/40 , H03K19/003 , H03M13/033 , H03M13/2909 , H03M13/611 , G06F2111/10 , G06F2201/82
Abstract: Methods, systems, and apparatus for producing CCZ states and T states. In one aspect, a method for transforming a CCZ state into three T states includes obtaining a first target qubit, a second target qubit and a third target qubit in a CCZ state; performing a X−1/2 gate on the third target qubit; performing an X gate on the first target qubit and the second target qubit using the third target qubit as a control; performing a Z gate on the first target qubit and the second target qubit using the third qubit as a X axis control; performing a Z−1/4 gate on the third target qubit; and performing a Z gate on the first target qubit and the second target qubit using the third qubit as a X axis control to obtain the three T states.
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公开(公告)号：US20240078152A1
公开(公告)日：2024-03-07
申请号：US18220752
申请日：2023-07-11
Applicant: Google LLC
Inventor： Austin Greig Fowler
CPC classification number: G06F11/1044 , G06F15/16 , G06N10/00 , G06N10/70
Abstract: Apparatus for quantum error correction is disclosed. The apparatus includes an array of processing cores, each processing core comprising: a processor on a first chip; and a processor cache on the first chip; and a bus for interconnecting neighbouring processing cores in the array of processing cores; wherein each processing core includes: control code which, when executed by the processor, causes the processor to access a processor cache of at least one neighbouring processing core.
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公开(公告)号：US11449385B2
公开(公告)日：2022-09-20
申请号：US16645776
申请日：2017-09-13
Applicant: Google LLC
Inventor： Austin Greig Fowler
Abstract: Apparatus for quantum error correction is disclosed. The apparatus includes an array of processing cores, each processing core comprising: a processor on a first chip; and a processor cache on the first chip; and a bus for interconnecting neighbouring processing cores in the array of processing cores; wherein each processing core includes: control code which, when executed by the processor, causes the processor to access a processor cache of at least one neighbouring processing core.
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公开(公告)号：US20220029625A1
公开(公告)日：2022-01-27
申请号：US17296909
申请日：2019-11-27
Applicant: Google LLC
Inventor： Craig Gidney , Austin Greig Fowler
IPC: H03K19/003 , G06N10/00
Abstract: Methods, systems, and apparatus for producing CCZ states and T states. In one aspect, a method for distilling a CCZ state includes preparing multiple target qubits, ancilla qubits and stabilizer qubits in a zero state, performing an X gate for each stabilizer qubit on multiple ancilla qubits or multiple ancilla qubits and one of the target qubits using the stabilizer qubit as a control, measuring the stabilizer qubits, performing, on each of the ancilla qubits, a Z1/4 gate and a Hadamard gate, measuring each of the ancilla qubits, performing, conditioned on each measured ancilla qubit state, a NOT operation on a selected stabilizer qubit, or a NOT operation on the selected stabilizer qubit and a Z gate on one or more respective target qubits, performing, on each target qubit and conditioned on a measured state of a respective stabilizer qubit, a Z gate on the target qubit, and performing an X gate on each of the target qubits.
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公开(公告)号：US11087233B2
公开(公告)日：2021-08-10
申请号：US16636528
申请日：2017-08-09
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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