Microscopic relaxation channels in materials for superconducting qubits

@article{Premkumar2021MicroscopicRC,
  title={Microscopic relaxation channels in materials for superconducting qubits},
  author={A. Premkumar and C. Weiland and Sooyeon Hwang and Berthold Jaeck and Alexander Place and I. Waluyo and A. Hunt and V. Bisogni and J. Pelliciari and A. Barbour and Mike S. Miller and P. Russo and F. Camino and K. Kisslinger and X. Tong and M. Hybertsen and A. Houck and I. Jarrige},
  journal={Communications Materials},
  year={2021},
  volume={2}
}
Despite mounting evidence that materials imperfections are a major obstacle to practical applications of superconducting qubits, connections between microscopic material properties and qubit coherence are poorly understood. Here, we combine measurements of transmon qubit relaxation times (T1) with spectroscopy and microscopy of the polycrystalline niobium films used in qubit fabrication. By comparing films deposited using three different techniques, we reveal correlations between T1 and… Expand

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