Efficient characterization of qudit logical gates with gate set tomography using an error-free Virtual-Z-gate model
(2022)
High coherence and low cross-talk in a tileable 3D integrated superconducting circuit architecture
Science Advances American Association for the Advancement of Science (AAAS) 8:16 (2022) eabl6698
Spatial Charge Sensitivity in a Multimode Superconducting Qubit
Physical Review Applied American Physical Society (APS) 17:2 (2022) 024058
Radio-frequency characterization of a supercurrent transistor made of a carbon nanotube
Materials for Quantum Technology IOP Publishing 1:3 (2021) 035003
Abstract:
A supercurrent transistor is a superconductor–semiconductor hybrid device in which the Josephson supercurrent is switched on and off using a gate voltage. While such devices have been studied using DC transport, radio-frequency measurements allow for more sensitive and faster experiments. Here a supercurrent transistor made from a carbon nanotube is measured simultaneously via DC conductance and radio-frequency reflectometry. The radio-frequency measurement resolves all the main features of the conductance data across a wide range of bias and gate voltage, and many of these features are seen more clearly. These results are promising for measuring other kinds of hybrid superconducting devices, in particular for detecting the reactive component of the impedance, which a DC measurement can never detect.Characterisation of spatial charge sensitivity in a multi-mode superconducting qubit
(2021)