Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
By Pranav S. Mundada, Gengyan Zhang, T. Hazard, Andrew A. Houck. Physical Review Applied, 2018
215 citations recorded by the source corpus.
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 interaction 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 $\sqrt{\textrm{iSWAP}}$ gate fidelity of 94.8% obtained via quantum process tomography.
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/1251d5d8ee6ffe283ac45152cba3642f71634da8
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Suppression of Crosstalk in Superconducting Qubits Using Dynamical Decoupling (2021, background): “For qubits coupled via tunable couplers, it is possible to adjust the coupler frequency such that the ZZ interactions from each coupler destructively interfere [21], however, a simple and universal scheme for ZZ-crosstalk suppression based purely on transmons is still lacking.”
- High fidelity two-qubit gates on fluxoniums using a tunable coupler (2022, background): “[18] Pranav Mundada, Gengyan Zhang, Thomas Hazard, and Andrew Houck.”