Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit

Pranav Mundada, Gengyan Zhang, Thomas Hazard, Andrew Houck

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Parasitic crosstalk in superconducting quantum devices is a leading limitation for quantum gates. We demonstrate the suppression of static ZZ crosstalk in a two-qubit, two-coupler superconducting circuit, where the frequency of a tunable coupler can be adjusted such that the ZZ interactions from each coupler destructively interfere. We verify the crosstalk elimination with simultaneous randomized benchmarking, and use a parametrically activated iswap interaction to achieve a Bell-state preparation fidelity of 98.5% and a iswap-gate fidelity of 94.8% obtained via quantum-process tomography.

Original languageEnglish (US)
Article number054023
JournalPhysical Review Applied
Volume12
Issue number5
DOIs
StatePublished - Nov 11 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit'. Together they form a unique fingerprint.

Cite this