Decay-protected superconducting qubit with fast control enabled by integrated on-chip filters

Achieving fast gates and long coherence times for superconducting qubits presents challenges, typically requiring either a stronger coupling of the drive line or an excessively strong microwave signal to the qubit. To address this, we introduce on-chip filters of the qubit drive exhibiting a stopband at the qubit frequency, thus enabling long coherence times and strong coupling at the subharmonic frequency, facilitating fast single-qubit gates, and reduced thermal load. The filters exhibit an extrinsic relaxation time of a few seconds while enabling sub-10-ns gates with subharmonic control. Here we show up to 200-fold improvement in the measured relaxation time at the stopband. Furthermore, we implement subharmonic driving of Rabi oscillations with a π pulse duration of 12 ns. Our demonstration of on-chip filters and efficient subharmonic driving in a two-dimensional quantum processor paves the way for a scalable qubit architecture with reduced thermal load and noise from the control line.

Description

DOI

10.1038/s42005-024-01733-3

Citation

Sah, A, Kundu, S, Suominen, H, Chen, Q & Möttönen, M 2024, ' Decay-protected superconducting qubit with fast control enabled by integrated on-chip filters ', Communications Physics, vol. 7, no. 1, 227, pp. 1-8 . https://doi.org/10.1038/s42005-024-01733-3

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-202408065295

Collections

[article-cris] Perustieteiden korkeakoulu / SCI

Show all metadata

Decay-protected superconducting qubit with fast control enabled by integrated on-chip filters

Access rights

Journal Title

Journal ISSN

Volume Title

Author

Date

Department

Major/Subject

Mcode

Degree programme

Language

Pages

Series

Abstract

Description

Keywords

Other note

DOI

Citation

Permanent link to this item

Collections