Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit

Pranav Mundada, Gengyan Zhang, Thomas Hazard, Andrew Houck

Research output: Contribution to journalArticlepeer-review

130 Scopus citations


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
Issue number5
StatePublished - Nov 11 2019

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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