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US 11,694,106 B2Granted
Quantum computing device using two gate types to prevent frequency collisions in superconducting quantum computers
AssigneeInternational Business Machines Corporation
InventorsDavid C. McKay, Jay M. Gambetta
Life of this patent
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Abstract
A quantum computing device including a first plurality of qubits having a first resonance frequency and a second qubit having a second resonance frequency, the second resonance frequency being different from the first resonance frequency; and a first tunable frequency bus configured to couple the first plurality of qubits to the second qubit.
Claims20
A quantum computing device, comprising:
- a plurality of qubits having respective resonance frequencies, wherein at least two qubits of the plurality of qubits have different resonance frequencies;
- and
- a plurality of frequency buses configured to couple the plurality of qubits;
- and
- wherein pairs of adjacent qubits of the plurality of qubits having a same resonance frequency are only coupled via cross-resonance, and pairs of adjacent qubits of the plurality of qubits having different resonance frequencies are only coupled via respective parametric iSWAP gates, and wherein each pair of adjacent qubits of the plurality of qubits does not have an intervening qubit on an associated frequency bus connecting the pair of adjacent qubits.
2 more elements
A method of producing a quantum computing device comprising:
- producing a plurality of qubits having respective resonance frequencies, wherein at least two qubits of the plurality of qubits have different resonance frequencies;
- and
- producing a plurality of frequency buses configured to couple the plurality of qubits;
- and
- wherein pairs of adjacent qubits of the plurality of qubits having a same resonance frequency are configured to only be coupled via cross-resonance, and pairs of adjacent qubits of the plurality of qubits having different resonance frequencies are configured to only be coupled via respective parametric iSWAP gates, and wherein each pair of adjacent qubits of the plurality of qubits does not have an intervening qubit on an associated frequency bus connecting the pair of adjacent qubits.
2 more elements
Dependencies are inferred from the claim text.