Tuning Tunneling Resistance of Josephson Junctions for Precise Qubit Control

Superconducting qubits are leading candidates in the race to build a quantum computer that is capable of realizing computations beyond the reach of modern supercomputers. To build scalable systems of superconducting qubits, it is essential to achieve precise control of qubit frequencies to a level not yet reachable by fabrication. The most commonly employed method to set qubit frequency post-fabrication is by using flux-tunable qubits, but adding flux-bias lines occupies chip space and introduces additional noise channels. In this talk I present progress towards using controlled electromigration to adjust the tunneling resistance of Josephson junctions and tune qubit frequencies.