Superconducting quantum technologies require qubit systems whose properties meet several often conflicting requirements, such as long coherence times and high anharmonicity. Here, we provide an engineering framework based on a generalized superconducting qubit model in the flux regime, which abstracts multiple circuit design parameters and thereby supports design optimization across multiple qubit properties. We experimentally investigate a special parameter regime which has both high anharmonicity (∼1GHz) and long quantum coherence times (T1=40−80μs and T2Echo=2T1).
@article{arxiv.2006.04130,
title = {Engineering Framework for Optimizing Superconducting Qubit Designs},
author = {Fei Yan and Youngkyu Sung and Philip Krantz and Archana Kamal and David K. Kim and Jonilyn L. Yoder and Terry P. Orlando and Simon Gustavsson and William D. Oliver},
journal= {arXiv preprint arXiv:2006.04130},
year = {2020}
}