Protection of a qubit with a subradiance effect: Josephson quantum filter

@inproceedings{Koshino2019ProtectionOA,
  title={Protection of a qubit with a subradiance effect: Josephson quantum filter},
  author={Kazuki Koshino and Shingo Kono and Yasunobu Nakamura},
  year={2019}
}
  • Kazuki Koshino, Shingo Kono, Yasunobu Nakamura
  • Published 2019
  • Physics, Mathematics
  • The coupling between a superconducting qubit and a control line inevitably results in radiative decay of the qubit into the line. We propose a Josephson quantum filter (JQF), which protects the data qubit (DQ) from radiative decay through the control line without reducing the gate speed on DQ. JQF consists of a qubit strongly coupled to the control line to DQ, and its working principle is a subradiance effect characteristic to waveguide quantum electrodynamics setups. JQF is a passive circuit… CONTINUE READING

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