Benchmarking the noise sensitivity of different parametric two-qubit gates in a single superconducting quantum computing platform
Sep 18, 2020
18 pages
Published in:
- Phys.Rev.Res. 2 (2020) 3, 033447
- Published: Sep 18, 2020
Citations per year
Abstract: (APS)
The possibility to utilize different types of two-qubit gates on a single quantum computing platform adds
flexibility in the decomposition of quantum algorithms. A larger hardware-native gate set may decrease the
number of required gates, provided that all gates are realized with high fidelity. Here, we benchmark both
controlled-Z (CZ) and exchange-type (iSWAP) gates using a parametrically driven tunable coupler that mediates
the interaction between two superconducting qubits. Using randomized benchmarking protocols we estimate an
error per gate of 0.9 ± 0.03 and 1.3 ± 0.4% for the CZ and the iSWAP gate, respectively.We argue that spurious
ZZ-type couplings are the dominant error source for the iSWAP gate, and that phase stability of all microwave
drives is of utmost importance. Such differences in the achievable fidelities for different two-qubit gates have to
be taken into account when mapping quantum algorithms to real hardware.- Quantum Information, Science & Technology
- Entanglement production
- Quantum algorithms
- Quantum benchmarking
- Quantum control
- Quantum gates
- Quantum information architectures & platforms
- Quantum information with solid state qubits
- qubit: superconductivity
- gate
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