Operating a coupler device to perform quantum logic gates

This invention describes a way to perform a quantum logic gate by precisely tuning a special 'coupler' device within a quantum computer. The coupler's operating frequency is adjusted to match that of a 'qubit' (the basic unit of quantum information). This interaction causes a specific change, called a phase shift, in the qubit's quantum state, which is essential for quantum computation. The claims specifically describe this interaction with a single qubit.

Why it matters: Since 2015, significant advancements in superconducting qubit coherence times and control precision have made such fine-tuned interactions more feasible. The development of more robust quantum processor architectures and error correction techniques could make this method of generating phase shifts more practical for building scalable quantum computers.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedSuperconducting quantum hardware, cryogenic environment, precise frequency control

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