International Business Machines Corporation

John Aaron Smolin

Jay Michael Gambetta

David William Abraham

Sami Rosenblatt

Jerry M Chow

Jared Barney Hertzberg

Easwar Magesan

Lev Samuel Bishop

Antonio Corcoles-Gonzalez

Jinsung Kim

Techniques facilitating frequency allocation in multi-qubit circuits are provided. In one example, a computer-implemented method comprises determining, by a device operatively coupled to a processor, an estimated fabrication yield associated with respective qubit chip configurations by conducting simulations of the respective qubit chip configurations at respective frequency offsets; and selecting, by the device, a qubit chip configuration from among the respective qubit chip configurations based on the estimated fabrication yield associated with the respective qubit chip configurations.

Frequency allocation in multi-qubit circuits

A method for characterizing noise in a quantum system, the quantum system including a plurality of qubits and a plurality of entangling gates native to the quantum system, includes generating a random quantum circuit on a quantum processor, the random quantum circuit comprising the plurality of entangling gates native to the quantum system. The method includes running a simulation of the random quantum circuit on a classical computer a plurality of times to obtain ideal outcomes, and running the random quantum circuit on the quantum processor a plurality of times to obtain experimental outcomes. The method includes grouping the experimental outcomes based on probabilities of the ideal outcomes to obtain a first distribution, and grouping the experimental outcomes based on probabilities of the experimental outcomes to obtain a second distribution. The method includes characterizing noise in the quantum system based on the first distribution and the second distribution.

Noise classification through the output of random quantum circuits

A system for adjusting qubit frequency includes a qubit device having a Josephson junction and a shunt capacitor coupled to electrodes of the Josephson junction. A cantilevered conductor is separated from the shunt capacitor by a spacing. An adjustment mechanism is configured to deflect the cantilevered conductor to tune a qubit frequency for the qubit device.

Mechanically tunable superconducting qubit

A device lattice arrangement including a plurality of devices, a plurality of physical connections for the plurality of devices, wherein each of the plurality of devices are coupled to at least two of the plurality of physical connections, a plurality of identity labels associated with individual devices of the plurality of devices and an arrangement of identity labels such that pairs of devices of the plurality of devices connected by some number of the plurality of connections have different identity labels.

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John Aaron Smolin