Methods and systems for controlling qubits
OwnerDavid Peter DiVincenzo, Roger Hilsen Kochinventors
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Abstract
A system for quantum computing includes a plurality of qubits and a control system. The control system generates control signals to control operation of the qubits and sets a bias point of each quit between a first position, in which the qubit is disabled and not responsive to the control signals, and a second positions in which the qubit is enabled and responsive to the control signals.
Claims20
1 A system for quantum computing, comprising:
- a plurality of qubits;
- and
- a control system that generates control signals to control operation of the qubits and sets a bias point of each qubit between a first position, in which the qubit is disabled and not responsive to the control signals, and a second position, in which the qubit is enabled and responsive to the control signals.
The system of claim 1, wherein the qubits comprise Josephson junctions.
The system of claim 1, wherein the qubits comprise electron and nuclear spins.
The system of claim 1, wherein the qubits comprise quantum dots.
The system of claim 1, wherein the control signal is applied using a superconducting SFQ (Single Flux Quantum) circuit.
The system of claim 1, wherein the bias point is set using a plurality of select/deselect signal sources each coupled to a corresponding one of the qubits.
A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for controlling a quantum system comprising a plurality of qubits, the method steps comprising:
- applying a deselect signal to each qubit to set a bias point of each qubit to a first position, in which the qubit is disabled and not responsive to a control signal;
- applying a select signal to one or more selected qubits to move the bias point from the first position to a second position, in which the qubit is enabled and responsive to the control signal;
- and
- applying the control signal commonly to the qubits to perform an operation, wherein only the selected qubits for which the bias point is in the second position are triggered to perform the operation.
A method of controlling a plurality of qubits, comprising:
- providing a plurality of qubits, wherein each of the qubits has at least two bias points on an operating characteristic of the qubit for which the lowest eigen-frequency is substantially the same;
- and
- generating signals for moving the bias point of selected qubits between the at least two bias points.
A control system for controlling a plurality of qubits, the control system comprising:
- a control signal source commonly coupled to each qubit, which generates control signals to control operation of the qubits;
- and
- a plurality of select/deselect signal sources each coupled to a corresponding one of the qubits, wherein each select/deselect signal source independently operates to set a bias point of the corresponding qubit between a first position, in which the qubit is disabled and not responsive to the control signals, and a second position, in which the qubit is enabled and is responsive to the control signals.
Dependencies are inferred from the claim text.