US 11,895,931 B2
Frequency tuning of multi-qubit systems
Jared B. Hertzberg, Ossining, NY (US); Jason S. Orcutt, Katonah, NY (US); Hanhee Paik, Danbury, CT (US); Sami Rosenblatt, White Plains, NY (US); and Martin O. Sandberg, Ossining, NY (US)
Assigned to INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed by INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US)
Filed on Nov. 28, 2017, as Appl. No. 15/824,492.
Prior Publication US 2019/0165244 A1, May 30, 2019
Int. Cl. H10N 60/01 (2023.01); G06N 10/00 (2022.01); H10N 60/12 (2023.01); H10N 60/80 (2023.01)
CPC H10N 60/0884 (2023.02) [G06N 10/00 (2019.01); H10N 60/0661 (2023.02); H10N 60/0912 (2023.02); H10N 60/12 (2023.02); H10N 60/805 (2023.02)] 24 Claims
OG exemplary drawing
 
1. A method of forming a multi-qubit chip, the method comprising:
forming a plurality of qubits on a chip, wherein each qubit comprises a Josephson junction and a capacitor connected in parallel with one another;
measuring a resonance frequency of each qubit on the chip;
determining a set-point frequency for each qubit that achieves a defined collision probability with respect to a probability of frequency collisions between adjacent qubits; and
annealing a first Josephson junction of a first qubit of the plurality of qubits using a laser, based on parameters for the annealing from a database that relates the parameters to frequency shifts, to change the resonance frequency of the first qubit from a first resonance frequency to about a first set-point frequency determined for the first qubit.