OPERATING A COUPLER DEVICE TO PERFORM QUANTUM LOGIC GATES
First Claim
1. A quantum information control method for performing a quantum logic gate, the method comprising:
- receiving a coupler control signal at a coupler device in a quantum processor cell;
in response to the coupler control signal;
changing a coupler operating frequency of the coupler device toward a qubit operating frequency of a qubit device in the quantum processor cell; and
producing a phase shift in a quantum state of the qubit device by an interaction between the qubit device and the coupler device.
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Accused Products
Abstract
In a general aspect, a quantum logic gate can be performed by tuning a coupler device. One or more coupler control signals can be received at a coupler device in a quantum processor cell. In some instances, in response to the coupler control signals, a coupler operating frequency of the coupler device changes toward a qubit operating frequency of a qubit device, and a phase shift arises in a quantum state of the qubit device due to an interaction between the qubit device and the coupler device. In some instances, in response to the control signals, the coupler operating frequency changes toward a first qubit operating frequency of a first qubit device, then changes toward a second qubit operating frequency of a second qubit device, and a controlled-phase shift arises in a quantum state of the qubit devices due to interactions between the coupler device and the respective qubit devices.
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Citations
48 Claims
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1. A quantum information control method for performing a quantum logic gate, the method comprising:
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receiving a coupler control signal at a coupler device in a quantum processor cell; in response to the coupler control signal; changing a coupler operating frequency of the coupler device toward a qubit operating frequency of a qubit device in the quantum processor cell; and producing a phase shift in a quantum state of the qubit device by an interaction between the qubit device and the coupler device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A quantum computing system comprising:
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a coupler device in a quantum processor cell; a qubit device in the quantum processor cell; and a control system communicably coupled to the quantum processor cell and operable to; generate a coupler control signal configured to tune a coupler operating frequency of the coupler device toward a qubit operating frequency of the qubit device; and communicate the coupler control signal to the coupler device to generate, between the qubit device and the coupler device, an interaction that produces a phase shift in a quantum state of the qubit device. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A quantum information control method for performing a quantum logic gate, the method comprising:
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receiving coupler control signals at a coupler device in a quantum processor cell; in response to the coupler control signals; changing a coupler operating frequency of the coupler device toward a first qubit operating frequency of a first qubit device in the quantum processor cell; and changing the coupler operating frequency away from the first qubit operation frequency and toward a second qubit operating frequency of a second qubit device in the quantum processor cell; and producing a controlled-phase shift in a quantum state of the first and second qubit devices by interactions between the coupler device and respective the first and second qubit devices. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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26. A quantum computing system comprising:
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a coupler device in a quantum processor cell; a first qubit device in the quantum processor cell; a second qubit device in the quantum processor cell; and a control system communicably coupled to the quantum processor cell and operable to; generate a first coupler control signal configured to tune a coupler operating frequency of the coupler device toward a first qubit operating frequency of the first qubit device; generate a second coupler control signal configured to tune the coupler operating frequency away from the first qubit operating frequency and toward a second qubit operating frequency of the second qubit device; and communicate the first and second coupler control signals to the coupler device to generate, between the first qubit device, the second qubit device and the coupler device, interactions that produce a controlled-phase shift in a quantum state of the first and second qubit devices. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. A quantum information control method for performing a quantum logic gate, the method comprising:
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receiving a coupler control signal at a coupler device in a quantum processor cell; in response to the coupler control signal; lowering a coupler operating frequency of the coupler device toward a frequency of a joint excited state of first and second qubit devices in the quantum processor cell; and producing a controlled-phase shift in a quantum state of the first and second qubit devices by interactions between the coupler device and the respective first and second qubit devices. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A quantum computing system comprising:
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a coupler device in a quantum processor cell; a first qubit device in the quantum processor cell; a second qubit device in the quantum processor cell; and a control system communicably coupled to the quantum processor cell and operable to; generate a coupler control signal that lowers a coupler operating frequency of the coupler device toward a frequency of a joint excited state of the first and second qubit devices; and communicate the coupler control signal to the coupler device to generate, between the coupler device and the first and second qubit devices, an interaction that produces a controlled-phase shift in a quantum state of the first and second qubit devices. - View Dependent Claims (44, 45, 46, 47, 48)
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Specification