@article {1909.09749, archivePrefix = {arXiv}, eprint = {1909.09749}, primaryClass = {cond-mat.supr-con}, author = {Jürgen Lisenfeld and others}, title = {Electric field spectroscopy of material defects in transmon qubits}, year = {2019}, url = {http://arxiv.org/abs/1909.09749} }