-
- Hyunseong Kim
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
-
- Christian Jünger
- Computational Research Division, Lawrence Berkeley National Laboratory 2 , Berkeley, California 94720, USA
-
- Alexis Morvan
- Computational Research Division, Lawrence Berkeley National Laboratory 2 , Berkeley, California 94720, USA
-
- Edward S. Barnard
- Molecular Foundry Division, Lawrence Berkeley National Laboratory 3 , Berkeley, California 94720, USA
-
- William P. Livingston
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
-
- M. Virginia P. Altoé
- Molecular Foundry Division, Lawrence Berkeley National Laboratory 3 , Berkeley, California 94720, USA
-
- Yosep Kim
- Computational Research Division, Lawrence Berkeley National Laboratory 2 , Berkeley, California 94720, USA
-
- Chengyu Song
- Molecular Foundry Division, Lawrence Berkeley National Laboratory 3 , Berkeley, California 94720, USA
-
- Larry Chen
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
-
- John Mark Kreikebaum
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
-
- D. Frank Ogletree
- Molecular Foundry Division, Lawrence Berkeley National Laboratory 3 , Berkeley, California 94720, USA
-
- David I. Santiago
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
-
- Irfan Siddiqi
- Department of Physics, University of California 1 , Berkeley, California 94720, USA
抄録
<jats:p>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.</jats:p>
収録刊行物
-
- Applied Physics Letters
-
Applied Physics Letters 121 (14), 2022-10-03
AIP Publishing