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1.发明申请公开(公告)号：US20220156443A1
公开(公告)日：2022-05-19
申请号：US17098237
申请日：2020-11-13
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Fernando Brandao , Earl Campbell
IPC: G06F30/3308 , G06F8/20 , G06N10/00
Abstract: A Toffoli magic state to be injected in preparation of a Toffoli gate may be prepared using a bottom-up approach. In the bottom-up approach, computational basis states are prepared in a fault tolerant manner using a STOP algorithm. The computational basis states are further used to prepare the Toffoli magic state. The STOP algorithm tracks syndrome outcomes and can be used to determine when to stop repeating syndrome measurements such that faults are guaranteed to be below a threshold level. Also, the STOP algorithm may be used in growing repetition code from a first code distance to a second code distance, such as for use in the computational basis states.
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公开(公告)号：US11853159B1
公开(公告)日：2023-12-26
申请号：US17362754
申请日：2021-06-29
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Kyungjoo Noh , Fernando Brandao
CPC classification number: G06F11/104 , G06N10/00
Abstract: A fault tolerant quantum error correction protocol is implemented for a surface code comprising Gottesman Kitaev Preskill (GKP) qubits. Analog information is determined when measuring position or momentum shifts, wherein the analog information indicates a closeness of the shift to a decision boundary. The analog information is further used to determine confidence values for error corrected measurements from the GKP qubits of the surface code. These confidence values are used to dynamically determine edge weights in a matching graph used to decode syndrome measurements of the surface code, wherein the confidence values are obtained using a maximum-likelihood decoding protocol for two-qubit gates. Space-time correlated edges and other edges are included in the matching graph and weighted based at least in part on confidence values for qubits forming the respective edges.
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3.发明申请公开(公告)号：US20220178995A1
公开(公告)日：2022-06-09
申请号：US17218043
申请日：2021-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Kyungjoo Noh , Connor Hann , Fernando Brandao
IPC: G01R31/3177 , G06N10/00
Abstract: Extra edges are added to a group of edges for use in decoding syndrome measurements of a surface code implemented using hybrid acoustic-electric qubits. The extra edges include two-dimensional cross-edges and three-dimensional space-time correlated edges that identify correlated errors arising from spurious photon dissipation processes of a multiplexed control circuit that leads to cross-talk between storage modes of a set of the mechanical resonators controlled by the given multiplexed control circuit. Additionally, error probabilities used for edge weighting incorporate error probabilities due to the spurious photon dissipation processes.
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4.发明授权公开(公告)号：US11645570B1
公开(公告)日：2023-05-09
申请号：US17362761
申请日：2021-06-29
Applicant: Amazon Technologies, Inc.
Inventor： Kyungjoo Noh , Christopher Chamberland , Fernando Brandao
CPC classification number: G06N10/70 , G06F11/104 , G06N10/00
Abstract: A fault tolerant quantum error correction protocol is implemented for a surface code comprising Gottesman Kitaev Preskill (GKP) qubits. Analog information is determined when measuring position or momentum shifts, wherein the analog information indicates a closeness of the shift to a decision boundary. The analog information is further used to determine confidence values for error corrected measurements from the GKP qubits of the surface code. These confidence values are used to dynamically determine edge weights in a matching graph used to decode syndrome measurements of the surface code, wherein the confidence values are obtained using a maximum-likelihood decoding protocol for two-qubit gates. Also, a three-level ancilla is used to more reliably squeeze the GKP qunaught states.
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5.发明申请公开(公告)号：US20230080126A1
公开(公告)日：2023-03-16
申请号：US18045102
申请日：2022-10-07
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Fernando Brandao , Earl Campbell
IPC: G06F30/3308 , G06F8/20 , G06N10/00
Abstract: A Toffoli magic state to be injected in preparation of a Toffoli gate may be prepared using a bottom-up approach. In the bottom-up approach, computational basis states are prepared in a fault tolerant manner using a STOP algorithm. The computational basis states are further used to prepare the Toffoli magic state. The STOP algorithm tracks syndrome outcomes and can be used to determine when to stop repeating syndrome measurements such that faults are guaranteed to be below a threshold level. Also, the STOP algorithm may be used in growing repetition code from a first code distance to a second code distance, such as for use in the computational basis states.
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Patent Agency Ranking
公开(公告)号：US11321627B1
公开(公告)日：2022-05-03
申请号：US17098232
申请日：2020-11-13
Applicant: Amazon Technologies, Inc.
Inventor： Patricio Arrangoiz Arriola , Amir Safavi-Naeini , Oskar Jon Painter , Connor Hann , Fernando Brandao , Kyungjoo Noh , Joseph Kramer Iverson , Harald Esko Jakob Putterman , Christopher Chamberland , Earl Campbell
Abstract: A fault tolerant quantum computer is implemented using hybrid acoustic-electric qubits. A control circuit includes an asymmetrically threaded superconducting quantum interference devices (ATS) that excites excite phonons in a mechanical resonator by driving a storage mode of the mechanical resonator and dissipates phonons from the mechanical resonator via an open transmission line coupled to the control circuit, wherein the open transmission line is configured to absorb photons from a dump mode of the control circuit.
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公开(公告)号：US11941483B2
公开(公告)日：2024-03-26
申请号：US17217946
申请日：2021-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Connor Hann , Kyungjoo Noh , Patricio Arrangoiz Arriola , Christopher Chamberland , Fernando Brandao
Abstract: A fault tolerant quantum computer is implementing using hybrid acoustic-electric qubits. A control circuit includes an asymmetrically threaded superconducting quantum interference devices (ATS) that excites phonons in a mechanical resonator by driving a storage mode of the mechanical resonator and dissipates phonons from the mechanical resonator via an open transmission line coupled to the control circuit, wherein the open transmission line is configured to absorb photons from a dump mode of the control circuit. Filters are included in the control circuit to suppress cross-talk errors. Additionally, frequencies and pump mode detunings for respective multiplexed control circuits are strategically selected to reduce cross-talk errors.
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8.发明授权公开(公告)号：US11580436B2
公开(公告)日：2023-02-14
申请号：US17218043
申请日：2021-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Kyungjoo Noh , Connor Hann , Fernando Brandao
Abstract: Extra edges are added to a group of edges for use in decoding syndrome measurements of a surface code implemented using hybrid acoustic-electric qubits. The extra edges include two-dimensional cross-edges and three-dimensional space-time correlated edges that identify correlated errors arising from spurious photon dissipation processes of a multiplexed control circuit that leads to cross-talk between storage modes of a set of the mechanical resonators controlled by the given multiplexed control circuit. Additionally, error probabilities used for edge weighting incorporate error probabilities due to the spurious photon dissipation processes.
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公开(公告)号：US20220180236A1
公开(公告)日：2022-06-09
申请号：US17217946
申请日：2021-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Connor Hann , Kyungjoo Noh , Patricio Arrangoiz Arriola , Christopher Chamberland , Fernando Brandao
Abstract: A fault tolerant quantum computer is implementing using hybrid acoustic-electric qubits. A control circuit includes an asymmetrically threaded superconducting quantum interference devices (ATS) that excites phonons in a mechanical resonator by driving a storage mode of the mechanical resonator and dissipates phonons from the mechanical resonator via an open transmission line coupled to the control circuit, wherein the open transmission line is configured to absorb photons from a dump mode of the control circuit. Filters are included in the control circuit to suppress cross-talk errors. Additionally, frequencies and pump mode detunings for respective multiplexed control circuits are strategically selected to reduce cross-talk errors.
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10.发明授权公开(公告)号：US12169673B2
公开(公告)日：2024-12-17
申请号：US18045102
申请日：2022-10-07
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Fernando Brandao , Earl Campbell
IPC: G06F30/3308 , G06F8/20 , G06N10/00 , G06F111/10 , G06F119/02
Abstract: A Toffoli magic state to be injected in preparation of a Toffoli gate may be prepared using a bottom-up approach. In the bottom-up approach, computational basis states are prepared in a fault tolerant manner using a STOP algorithm. The computational basis states are further used to prepare the Toffoli magic state. The STOP algorithm tracks syndrome outcomes and can be used to determine when to stop repeating syndrome measurements such that faults are guaranteed to be below a threshold level. Also, the STOP algorithm may be used in growing repetition code from a first code distance to a second code distance, such as for use in the computational basis states.
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