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公开(公告)号：US12182660B2
公开(公告)日：2024-12-31
申请号：US18483758
申请日：2023-10-10
Applicant: Google LLC
Inventor： Kevin Joseph Satzinger , Julian Shaw Kelly , Paul Victor Klimov , Alexander Nikolaevich Korotkov
Abstract: Systems and methods for measuring quantum states of qubits with more than two levels are provided. A method can include, for a plurality of shuffling sequences, applying, by a quantum computer, one or more quantum gates to the one or more qubits to execute a quantum algorithm; applying, by the quantum computer, a shuffling sequence to the one or more qubits; and measuring, using a readout apparatus, the state of the one or more qubits to determine a readout state. The method can further include determining, by a classical computer or the quantum computer, an average occupation for one or more of the quantum states of the one or more qubits using the readout states for each of the shuffling sequences. The readout states can correspond to a state in a subset of the quantum states of the one or more qubits.
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Patent Agency Ranking
公开(公告)号：US12008435B2
公开(公告)日：2024-06-11
申请号：US17694820
申请日：2022-03-15
Applicant: Google LLC
Inventor： Alexander Nikolaevich Korotkov , Kevin Joseph Satzinger , Matthew James McEwen , Vadim Smelyanskiy , Paul Victor Klimov , Rami Barends , Julian Shaw Kelly , Juan Carlos Atalaya-Chavez , Zijun Chen
CPC classification number: G06N10/40
Abstract: A quantum computing system configured for removal of leakage states can include quantum hardware including a first qubit and a second qubit, wherein the first qubit is configured to have a first transition frequency and wherein the second qubit is configured to have a second transition frequency, the first transition frequency being greater than the second transition frequency. The quantum computing system can include one or more quantum control devices configured to control operation of at least the first qubit and the second qubit, wherein the one or more quantum control devices are configured to implement a quantum gate operation on the first qubit and the second qubit based at least in part on the first transition frequency and the second transition frequency, and wherein the one or more quantum control devices are configured to periodically reset a quantum state of the first qubit.
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公开(公告)号：US12260157B1
公开(公告)日：2025-03-25
申请号：US17109455
申请日：2020-12-02
Applicant: Google LLC
Inventor： Kevin Joseph Satzinger , Andrew Lorne Dunsworth , Kostyantyn Yevgenovych Kechedzhi , Julian Shaw Kelly , Charles James Neill , Pedram Roushan
IPC: G06F30/20 , G06N10/00 , G06F111/10
Abstract: Systems and methods for calibrating and initializing a system comprising a first qubit, a second qubit, and a coupler are provided. A method of initializing the system can include calibrating the system; providing a first idle resonance frequency of the first qubit and a second idle resonance frequency of the second qubit; providing the first bias for the first idle resonance frequency and the second bias for the second idle resonance frequency; determining a value of the third resonance frequency at which a difference between the first degree of coupling and the second degree of coupling is minimized, when the first resonance frequency is the first idle resonance frequency and the second resonance frequency is the second idle resonance frequency; and providing the third bias according to the determined value of the third resonance frequency.
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公开(公告)号：US20240119326A1
公开(公告)日：2024-04-11
申请号：US18483758
申请日：2023-10-10
Applicant: Google LLC
Inventor： Kevin Joseph Satzinger , Julian Shaw Kelly , Paul Victor Klimov , Alexander Nikolaevich Korotkov
Abstract: Systems and methods for measuring quantum states of qubits with more than two levels are provided. A method can include, for a plurality of shuffling sequences, applying, by a quantum computer, one or more quantum gates to the one or more qubits to execute a quantum algorithm; applying, by the quantum computer, a shuffling sequence to the one or more qubits; and measuring, using a readout apparatus, the state of the one or more qubits to determine a readout state. The method can further include determining, by a classical computer or the quantum computer, an average occupation for one or more of the quantum states of the one or more qubits using the readout states for each of the shuffling sequences. The readout states can correspond to a state in a subset of the quantum states of the one or more qubits.
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公开(公告)号：US11816535B1
公开(公告)日：2023-11-14
申请号：US17109448
申请日：2020-12-02
Applicant: Google LLC
Inventor： Kevin Joseph Satzinger , Julian Shaw Kelly , Paul Victor Klimov , Alexander Nikolaevich Korotkov
Abstract: Systems and methods for measuring quantum states of qubits with more than two levels are provided. A method can include, for a plurality of shuffling sequences, applying, by a quantum computer, one or more quantum gates to the one or more qubits to execute a quantum algorithm; applying, by the quantum computer, a shuffling sequence to the one or more qubits; and measuring, using a readout apparatus, the state of the one or more qubits to determine a readout state. The method can further include determining, by a classical computer or the quantum computer, an average occupation for one or more of the quantum states of the one or more qubits using the readout states for each of the shuffling sequences. The readout states can correspond to a state in a subset of the quantum states of the one or more qubits.
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公开(公告)号：US20220414514A1
公开(公告)日：2022-12-29
申请号：US17694820
申请日：2022-03-15
Applicant: Google LLC
Inventor： Alexander Nikolaevich Korotkov , Kevin Joseph Satzinger , Matthew James McEwen , Vadim Smelyanskiy , Paul Victor Klimov , Rami Barends , Julian Shaw Kelly , Juan Carlos Atalaya-Chavez , Zijun Chen
IPC: G06N10/40
Abstract: A quantum computing system configured for removal of leakage states can include quantum hardware including a first qubit and a second qubit, wherein the first qubit is configured to have a first transition frequency and wherein the second qubit is configured to have a second transition frequency, the first transition frequency being greater than the second transition frequency. The quantum computing system can include one or more quantum control devices configured to control operation of at least the first qubit and the second qubit, wherein the one or more quantum control devices are configured to implement a quantum gate operation on the first qubit and the second qubit based at least in part on the first transition frequency and the second transition frequency, and wherein the one or more quantum control devices are configured to periodically reset a quantum state of the first qubit.
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