Protection of a qubit with a subradiance effect: Josephson quantum filter
arXiv:1909.06544 · doi:10.1103/PhysRevApplied.13.014051
Abstract
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 element and is therefore suitable for integration in a scalable superconducting qubit system.
13 pages, 7 figures
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Cited by in corpus (6)
- Photon-noise-tolerant dispersive readout of a superconducting qubit using a nonlinear Purcell filter
- Breaking the trade-off between fast control and long lifetime of a superconducting qubit
- Nonclassicality of open circuit QED systems in the deep-strong coupling regime
- Solid-state platform for cooperative quantum dynamics driven by correlated emission
- Deterministic three-photon down-conversion by a passive ultrastrong cavity-QED system
- Saturable Purcell filter for circuit quantum electrodynamics