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Superconducting Qubits
Quantum Foundations
Suppression of Qubit Crosstalk in a Tunable Coupling Superconducting Circuit
arXiv
Authors: Pranav S. Mundada, Gengyan Zhang, Thomas Hazard, Andrew A. Houck
Year
2018
Paper ID
24133
Status
Preprint
Abstract Read
~2 min
Abstract Words
84
Citations
N/A
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 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.
Why This Paper Matters
- This paper contributes to the Quantum Foundations research area in the Quantum Articles archive.
- It adds a 2018 reference point for readers tracking recent quantum research.
- Parasitic crosstalk in superconducting quantum devices is a leading limitation for quantum gates.
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