Demonstration of a High-Fidelity cnot Gate for Fixed-Frequency Transmons with Engineered <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mi>Z</mml:mi></mml:mrow></mml:math> Suppression
نویسندگان
چکیده
Improving two-qubit gate performance and suppressing crosstalk are major, but often competing, challenges to achieving scalable quantum computation. In particular, increasing the coupling realize faster gates has been intrinsically linked enhanced due unwanted terms in Hamiltonian. Here, we demonstrate a novel architecture for transmon qubits that circumvents standard relationship between desired undesired interaction rates. Using two fixed frequency elements tune dressed level spacings, an intrinsic suppression of static $ZZ$, while maintaining large effective Our reveals no observable degradation qubit coherence ($T_1,T_2 > 100~\mu s$) and, over factor 6 improvement ratio coupling. cross-resonance 180~ns single-pulse CNOT gate, measure fidelity 99.77(2)$\%$ from interleaved randomized benchmarking.
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2021
ISSN: ['1079-7114', '0031-9007', '1092-0145']
DOI: https://doi.org/10.1103/physrevlett.127.130501