- Kim, Hyunseong;
- Jünger, Christian;
- Morvan, Alexis;
- Barnard, Edward S;
- Livingston, William P;
- Altoé, M Virginia P;
- Kim, Yosep;
- Song, Chengyu;
- Chen, Larry;
- Kreikebaum, John Mark;
- Ogletree, D Frank;
- Santiago, David I;
- Siddiqi, Irfan
As superconducting quantum processors increase in complexity, techniques to overcome constraints on frequency crowding are needed. The recently developed method of laser-annealing provides an effective post-fabrication method to adjust the frequency of superconducting qubits. Here, we present an automated laser-annealing apparatus based on conventional microscopy components and demonstrate preservation of highly coherent transmons. In addition, we perform noise spectroscopy to investigate the change in defect features, in particular, two-level system defects, after laser-annealing. Finally, we present a local heating model as well as demonstrate aging stability for laser-annealing on the wafer scale. Our work constitutes an important step toward both understanding the underlying physical mechanism and scaling up laser-annealing of superconducting qubits.