@article{a78e402a4dbf4fa5bcbf6d4d8332d847,
title = "Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit",
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.",
author = "Pranav Mundada and Gengyan Zhang and Thomas Hazard and Andrew Houck",
note = "Funding Information: This work was supported by IARPA under Contract No. W911NF-16-1-0114-FE. Devices were fabricated in the Princeton University Quantum Device Nanofabrication Laboratory and in the Princeton Institute for the Science and Technology of Materials clean room. The authors acknowledge the use of Princeton{\^a}{\texttrademark}s Imaging and Analysis Center, which is partially supported by the Princeton Center for Complex Materials, a National Science Foundationa-MRSEC program (Grant No. DMR-1420541) Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = nov,
day = "11",
doi = "10.1103/PhysRevApplied.12.054023",
language = "English (US)",
volume = "12",
journal = "Physical Review Applied",
issn = "2331-7019",
publisher = "American Physical Society",
number = "5",
}