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US Patent 10467544 Multi-qubit tunable coupling architecture using fixed-frequency superconducting qubits

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Patent

Patent attributes

Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
10467544
Date of Patent
November 5, 2019
Patent Application Number
14985529
Date Filed
December 31, 2015
Patent Citations Received
‌
US Patent 12120965 Mode-selective couplers for frequency collision reduction
3
‌
US Patent 11430831 Layered hybrid quantum architecture for quantum computing applications
‌
US Patent 11937516 Fabrication of a flux bias line local heating device
5
‌
US Patent 12022749 Flux bias line local heating device
6
‌
US Patent 10763420 Josephson Junction damascene fabrication
‌
US Patent 11586448 Qubit reset from excited states
‌
US Patent 11625638 Drive enhanced J/ZZ operation for superconducting qubits
9
‌
US Patent 11626555 Mode-selective couplers for frequency collision reduction
10
...
Patent Primary Examiner
‌
Kamran Afshar
Patent abstract

Various embodiments provide a coupling mechanism, method of activation and a square lattice. The coupling mechanism comprises two qubits and a tunable coupling qubit that activates an interaction between the two qubits by modulation of a frequency of the tunable coupling qubit. The tunable coupling qubit capacitively couples the two qubits. The tunable coupling qubit is modulated at a difference frequency of the two qubits. The difference frequency may be significantly larger than an anharmonicity of the two qubits. The tunable coupling qubit may be coupled to the two qubits by two electrodes separated by a superconducting quantum interference device (SQUID) loop having two Josephson junctions or by a single electrode with a SQUID loop coupling to ground. The SQUID loop is controlled by an inductively-coupled flux bias line positioned at the center of the tunable coupling qubit.

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