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1.发明申请公开(公告)号：US20250068952A1
公开(公告)日：2025-02-27
申请号：US18456208
申请日：2023-08-25
Applicant: Google LLC
Inventor： Nicholas Reinhard Zobrist , Kevin Chenghao Miao , Alex Opremcak , Ofer Naaman , Theodore Charles White , Daniel Sank
IPC: G06N10/40
Abstract: A quantum computing system includes a cryogenic chamber and an integrated circuit located in the chamber. The integrated circuit includes a substrate, a qubit formed on the substrate, and a dissipative element that is formed on the substrate and coupled to the qubit. When the qubit is tuned to a first flux value, the integrated circuit is enabled to perform quantum-computation operations on a set of quantum states of the qubit. The quantum states include a ground state and an excited state. When the qubit is tuned to a second flux value, the qubit is enabled to transfer energy associated with the excited state from the qubit to the dissipative element. Upon the energy transfer, the qubit is transitioned to the ground state. The dissipative element is enabled to dissipate the transferred energy to a portion of the substrate.
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Patent Agency Ranking
2.发明申请公开(公告)号：US20250061365A1
公开(公告)日：2025-02-20
申请号：US18450996
申请日：2023-08-16
Applicant: Google LLC
Inventor： Daniel Sank , Evan Robert Jeffrey
IPC: G06N10/40
Abstract: This disclosure is directed to a quantum computing system (QCS) that includes a cryogenic sub-system, a signal-generating element, a first signal-splitting element, a first transmission path, a second transmission path, a third transmission path, and a quantum device. A first environment is located outside the cryogenic sub-system and a second environment is associated with the cryogenic sub-system. The signal-generating element generates a first signal. The first signal-splitting element is positioned within the second environment. The quantum device is positioned within the cryogenic sub-system. The first transmission path transmits the first signal from the signal-generating element to the first signal-splitting element. The first signal-splitting element subdivides the first signal into a second signal and a third signal. The third transmission transmits the third signal from the first signal-splitting element to the first environment. The second transmission path transmits the second signal from the first signal-splitting element to the quantum device.
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公开(公告)号：US12198001B2
公开(公告)日：2025-01-14
申请号：US17010267
申请日：2020-09-02
Applicant: Google LLC
Inventor： Daniel Sank
Abstract: Systems and methods for balanced inductive and capacitive coupling for quantum circuits are provided. A quantum circuit can include a qubit structure comprising an inductor and at least a first portion of a qubit capacitor. The quantum circuit can further include a ground, and a second portion of the qubit capacitor coupled to the ground. The quantum circuit can further include a readout resonator configured to measure a state of the qubit structure. The quantum circuit can further include a capacitive coupling between the readout resonator and the qubit structure and an inductive coupling between the readout resonator and the inductor of the qubit structure. A coupling strength of the inductive coupling and a coupling strength of the capacitive coupling can be approximately equal in magnitude.
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4.发明授权公开(公告)号：US12248851B1
公开(公告)日：2025-03-11
申请号：US18450996
申请日：2023-08-16
Applicant: Google LLC
Inventor： Daniel Sank , Evan Robert Jeffrey
IPC: G06N10/40
Abstract: This disclosure is directed to a quantum computing system (QCS) that includes a cryogenic sub-system, a signal-generating element, a first signal-splitting element, a first transmission path, a second transmission path, a third transmission path, and a quantum device. A first environment is located outside the cryogenic sub-system and a second environment is associated with the cryogenic sub-system. The signal-generating element generates a first signal. The first signal-splitting element is positioned within the second environment. The quantum device is positioned within the cryogenic sub-system. The first transmission path transmits the first signal from the signal-generating element to the first signal-splitting element. The first signal-splitting element subdivides the first signal into a second signal and a third signal. The third transmission transmits the third signal from the first signal-splitting element to the first environment. The second transmission path transmits the second signal from the first signal-splitting element to the quantum device.
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5.发明公开公开(公告)号：US20240305133A1
公开(公告)日：2024-09-12
申请号：US18180743
申请日：2023-03-08
Applicant: Google LLC
Inventor： Daniel Sank
Abstract: A quantum computing system includes a qubit, a coupler, and a resonator. The qubit has quantum states associated with discretized frequencies. The coupler has a tunable coupler frequency. When the coupler frequency is tuned to a first frequency value in accordance with a frequency of the qubit, a first energy-transfer operation is enabled that transfers a first quantized amount of energy from the first qubit to the coupler such that the qubit is prepared in a first quantum state. The resonator has a resonant frequency. The resonator is enabled to store input energy that is in accordance with its resonant frequency. When the coupler frequency is tuned to a second frequency value in accordance with its resonant frequency, a second energy-transfer operation is initiated that transfers the first quantized amount of energy from the coupler to the resonator. The resonator may dissipate the energy transferred to it.
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公开(公告)号：US20210065036A1
公开(公告)日：2021-03-04
申请号：US17010267
申请日：2020-09-02
Applicant: Google LLC
Inventor： Daniel Sank
Abstract: Systems and methods for balanced inductive and capacitive coupling for quantum circuits are provided. A quantum circuit can include a qubit structure comprising an inductor and at least a first portion of a qubit capacitor. The quantum circuit can further include a ground, and a second portion of the qubit capacitor coupled to the ground. The quantum circuit can further include a readout resonator configured to measure a state of the qubit structure. The quantum circuit can further include a capacitive coupling between the readout resonator and the qubit structure and an inductive coupling between the readout resonator and the inductor of the qubit structure. A coupling strength of the inductive coupling and a coupling strength of the capacitive coupling can be approximately equal in magnitude.
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