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公开(公告)号：US12008438B1
公开(公告)日：2024-06-11
申请号：US17707811
申请日：2022-03-29
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Earl Campbell
Abstract: A technique for performing lattice surgery using twists is disclosed. Also, an error correcting code and decoder is provided that allows for error decoding of Pauli measurements performed in association with a lattice surgery operation. This allows for overall run-times of lattice surgery to be reduced. For example, some level of errors are tolerable, because they can be corrected, thus fewer measurement rounds (dm) may be performed for a given round of Pauli measurements. Additionally, a temporal encoding of lattice surgery technique is provided, which may additionally or alternatively be used to shorten run times. Also, a quantum computer layout is provided, wherein the layout includes a core computing region and a cache region. Also, protocols for swapping logical qubits between the core and cache are provided.
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2.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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3.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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公开(公告)号：US20220156622A1
公开(公告)日：2022-05-19
申请号：US17098248
申请日：2020-11-13
Applicant: Amazon Technologies, Inc.
Inventor： Harald Esko Jakob Putterman , Kyungjoo Noh , Christopher Chamberland , Amir Safavi-Naeini , Oskar Jon Painter , Patricio Arrangoiz Arriola
Abstract: High-fidelity measurements of qubits are achieved by increasing a number of measurements taken by use of a swap operation and a readout qubit, deflating a bosonic qubit for which measurement outcomes are affected by single photon/phonon loss events, deflating a bosonic qubit enabling readout in other basis, and evolving the qubit under a Hamiltonian that couples a mode to be measured to another mode where the Hamiltonian is selected from a three wave mixing interaction, and/or a combination of these techniques.
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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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Patent Agency Ranking
公开(公告)号：US12165013B1
公开(公告)日：2024-12-10
申请号：US17937413
申请日：2022-09-30
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Luis Goncalves , Prasahnt Sivarajah , Eric Christopher Peterson , Sebastian Johannes Grimberg
Abstract: Techniques for training local decoders for use in a local and global decoding scheme for quantum error correction of circuit-level noise within quantum surface codes such that the decoding schemes have fast decoding throughout and low latency times for quantum algorithms are disclosed. The local decoders may have a neural network architecture and may be trained using training data sets comprising simulated rounds of syndrome measurements for respective simulated quantum surface codes in addition to information such as syndrome differences, qubit placements, and temporal boundaries within the simulated rounds of syndrome measurements in order to train the local decoders for arbitrarily sized quantum surface codes and arbitrary numbers of rounds of syndrome measurements. Following a local decoding stage in which a large number of data errors have been corrected by a local decoder, error correction for remaining errors may continue with a more efficient global decoding stage.
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公开(公告)号：US12165006B1
公开(公告)日：2024-12-10
申请号：US17545906
申请日：2021-12-08
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Earl Terence Campbell
IPC: G06N10/00
Abstract: A technique for performing lattice surgery without using twists is disclosed. Also, an error correcting code and decoder is provided that allows for error decoding of Pauli measurements performed in association with a lattice surgery operation. This allows for overall run-times of lattice surgery to be reduced. For example, some level of errors are tolerable, because they can be corrected, thus fewer measurement rounds (dm) may be performed for a given round of Pauli measurements. Additionally, a temporal encoding of lattice surgery technique is provided, which may additionally or alternatively be used to shorten run times. Also, a quantum computer layout is provided, wherein the layout includes a core computing region and a cache region. Also, protocols for swapping logical qubits between the core and cache are provided.
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公开(公告)号：US20220327410A1
公开(公告)日：2022-10-13
申请号：US17218046
申请日：2021-03-30
Applicant: Amazon Technologies, Inc.
Inventor： Christopher Chamberland , Kyungjoo Noh
IPC: G06N10/00 , G01R33/035 , G06F11/10 , H01L39/22
Abstract: A hybrid Bacon-Shor surface code is implemented using a fault tolerant quantum computer comprising 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. The hybrid Bacon-Shor surface code only couples four phononic modes per given ATS, reducing cross-talk as compared to other systems that couple more phononic modes per ATS. Also, measurements are performed such that three parity measurements are taken between a phononic readout mode and a transmon qubit in a given syndrome measurement cycle.
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9.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：US20240386304A1
公开(公告)日：2024-11-21
申请号：US18781848
申请日：2024-07-23
Applicant: Amazon Technologies, Inc.
Inventor： Harald Esko Jakob Putterman , Kyungjoo Noh , Christopher Chamberland , Amir Safavi-Naeini , Oskar Jon Painter , Patricio Arrangoiz Arriola
IPC: G06N10/40 , G06F30/3308 , G06N10/70 , H10N60/12
Abstract: High-fidelity measurements of qubits are achieved by increasing a number of measurements taken by use of a swap operation and a readout qubit, deflating a bosonic qubit for which measurement outcomes are affected by single photon/phonon loss events, deflating a bosonic qubit enabling readout in other basis, and evolving the qubit under a Hamiltonian that couples a mode to be measured to another mode where the Hamiltonian is selected from a three wave mixing interaction, and/or a combination of these techniques.
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