Patents by Inventor Kyungjoo Noh
Kyungjoo Noh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11941483Abstract: 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.Type: GrantFiled: March 30, 2021Date of Patent: March 26, 2024Assignee: Amazon Technologies, Inc.Inventors: Connor Hann, Kyungjoo Noh, Patricio Arrangoiz Arriola, Christopher Chamberland, Fernando Brandao
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Patent number: 11909451Abstract: Systems and methods for performing bosonic quantum error correction (QEC) using Gottesman-Kitaev-Preskill (GKP) states are provided. An ancilla quantum mechanical oscillator is used to probe Gaussian noise experienced by a data quantum mechanical oscillator without disturbing the state of the data quantum mechanical oscillator. The ancilla quantum mechanical oscillator is initialized with a GKP state and entangled with the state of a data quantum mechanical oscillator to correlate any noise experienced by the data state with the state of the ancilla quantum mechanical oscillator. The states are then disentangled, and momentum and position quadrature operators of the ancilla quantum mechanical oscillator are measured and used to perform QEC on the information stored in the data quantum mechanical oscillator.Type: GrantFiled: March 27, 2020Date of Patent: February 20, 2024Assignee: Yale UniversityInventors: Kyungjoo Noh, Steven M. Girvin, Liang Jiang
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Patent number: 11853159Abstract: 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.Type: GrantFiled: June 29, 2021Date of Patent: December 26, 2023Assignee: Amazon Technologies, Inc.Inventors: Christopher Chamberland, Kyungjoo Noh, Fernando Brandao
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Publication number: 20230206110Abstract: Quantum repeaters and network architectures use two concatenated quantum error correction codes to increase the transmission range of quantum information. A block of data qubits collectively encode a second-layer logical qubit according to a second-layer code concatenated with a first-layer code. A first-layer quantum repeater first-layer corrects each data qubit based on a first-layer syndrome extracted therefrom. The first-layer quantum repeater transmits these first-layer-corrected qubits to a second-layer quantum repeater via a quantum communication channel. The first-layer quantum repeater also transmits the first-layer syndromes to the second-layer quantum repeater via a classical communication channel. After extracting a second-layer syndrome from the first-layer-corrected qubits, the second-layer quantum repeater uses the first-layer syndromes and second-layer syndrome to second-layer correct the first-layer-corrected qubits.Type: ApplicationFiled: June 4, 2021Publication date: June 29, 2023Inventors: Liang Jiang, Filip D. Rozpedek, Kyungjoo Noh
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Preparation of qunaught states for a surface GKP code using a three (or higher) level ancilla system
Patent number: 11645570Abstract: 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.Type: GrantFiled: June 29, 2021Date of Patent: May 9, 2023Assignee: Amazon Technologies, Inc.Inventors: Kyungjoo Noh, Christopher Chamberland, Fernando Brandao -
Patent number: 11599820Abstract: 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 may further be used to determine confidence values for error corrected measurements from the GKP qubits of the surface code.Type: GrantFiled: June 29, 2021Date of Patent: March 7, 2023Assignee: Amazon Technologies, Inc.Inventors: Kyungjoo Noh, Christopher Chamberland, Fernando Brandao
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Patent number: 11580436Abstract: 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.Type: GrantFiled: March 30, 2021Date of Patent: February 14, 2023Assignee: Amazon Technologies, Inc.Inventors: Christopher Chamberland, Kyungjoo Noh, Connor Hann, Fernando Brandao
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Publication number: 20220327410Abstract: 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.Type: ApplicationFiled: March 30, 2021Publication date: October 13, 2022Applicant: Amazon Technologies, Inc.Inventors: Christopher Chamberland, Kyungjoo Noh
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Patent number: 11436398Abstract: A method of simulating quantum gates includes shifting a Fock basis for the simulation such that the simulation can be performed in a smaller (e.g. truncated) Hilbert dimension space. To shift the Fock basis, non-orthonormalized basis states are first defined. The defined basis states are then orthonormalized to construct orthonormalized shifted Fock basis state. Matrix elements are determined for an operator in the orthonormalized shifted Fock basis and the operator is used to simulate the quantum gate in the shifted Fock basis.Type: GrantFiled: November 13, 2020Date of Patent: September 6, 2022Assignee: Amazon Technologies, Inc.Inventors: Kyungjoo Noh, Joseph Kramer Iverson, Connor Hann
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Publication number: 20220190933Abstract: Systems and methods for performing bosonic quantum error correction (QEC) using Gottesman-Kitaev-Preskill (GKP) states are provided. An ancilla quantum mechanical oscillator is used to probe Gaussian noise experienced by a data quantum mechanical oscillator without disturbing the state of the data quantum mechanical oscillator. The ancilla quantum mechanical oscillator is initialized with a GKP state and entangled with the state of a data quantum mechanical oscillator to correlate any noise experienced by the data state with the state of the ancilla quantum mechanical oscillator. The states are then disentangled, and momentum and position quadrature operators of the ancilla quantum mechanical oscillator are measured and used to perform QEC on the information stored in the data quantum mechanical oscillator.Type: ApplicationFiled: March 27, 2020Publication date: June 16, 2022Applicant: Yale UniversityInventors: Kyungjoo Noh, Steven M. Girvin, Liang Jiang
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Publication number: 20220180236Abstract: 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.Type: ApplicationFiled: March 30, 2021Publication date: June 9, 2022Applicant: Amazon Technologies, Inc.Inventors: Connor Hann, Kyungjoo Noh, Patricio Arrangoiz Arriola, Christopher Chamberland, Fernando Brandao
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Publication number: 20220178995Abstract: 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.Type: ApplicationFiled: March 30, 2021Publication date: June 9, 2022Applicant: Amazon Technologies, Inc.Inventors: Christopher Chamberland, Kyungjoo Noh, Connor Hann, Fernando Brandao
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Publication number: 20220156621Abstract: 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.Type: ApplicationFiled: November 13, 2020Publication date: May 19, 2022Applicant: Amazon Technologies, Inc.Inventors: 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
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Publication number: 20220156622Abstract: 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.Type: ApplicationFiled: November 13, 2020Publication date: May 19, 2022Applicant: Amazon Technologies, Inc.Inventors: Harald Esko Jakob Putterman, Kyungjoo Noh, Christopher Chamberland, Amir Safavi-Naeini, Oskar Jon Painter, Patricio Arrangoiz Arriola
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Publication number: 20220156444Abstract: A method of simulating quantum gates includes shifting a Fock basis for the simulation such that the simulation can be performed in a smaller (e.g. truncated) Hilbert dimension space. To shift the Fock basis, non-orthonormalized basis states are first defined. The defined basis states are then orthonormalized to construct orthonormalized shifted Fock basis state. Matrix elements are determined for an operator in the orthonormalized shifted Fock basis and the operator is used to simulate the quantum gate in the shifted Fock basis.Type: ApplicationFiled: November 13, 2020Publication date: May 19, 2022Applicant: Amazon Technologies, Inc.Inventors: Kyungjoo Noh, Joseph Kramer Iverson, Connor Hann
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Patent number: 11321627Abstract: 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.Type: GrantFiled: November 13, 2020Date of Patent: May 3, 2022Assignee: Amazon Technologies, Inc.Inventors: 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
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Patent number: 10776709Abstract: According to some aspects, a quantum information system is provided that includes an ancilla qubit; a qudit coupled to the ancilla qubit, a detector configured to generate a detection result based on a quantum state of the ancilla qubit, and a driving source coupled to the qudit and the ancilla qubit and configured to apply at least one qudit driving signal to the qudit based on the detection result and at least one qubit driving signal to the qudit based on the detection result.Type: GrantFiled: November 10, 2017Date of Patent: September 15, 2020Assignee: Yale UniversityInventors: Chao Shen, Kyungjoo Noh, Victor V. Albert, Stefan Krastanov, Michel Devoret, Robert J. Schoelkopf, III, Steven M. Girvin, Liang Jiang
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Publication number: 20190266512Abstract: According to some aspects, a quantum information system is provided that includes an ancilla qubit; a qudit coupled to the ancilla qubit, a detector configured to generate a detection result based on a quantum state of the ancilla qubit, and a driving source coupled to the qudit and the ancilla qubit and configured to apply at least one qudit driving signal to the qudit based on the detection result and at least one qubit driving signal to the qudit based on the detection result.Type: ApplicationFiled: November 10, 2017Publication date: August 29, 2019Applicant: Yale UniversityInventors: Chao Shen, Kyungjoo Noh, Victor V. Albert, Stefan Krastanov, Michel Devoret, Robert J. Schoelkopf, Steven M. Girvin, Liang Jiang