Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits

Details Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits Complete universal quantum gate set approaching fault-tolerant thresholds with superconducting qubits

2012-02-23

arxiv.org/abs/1202.5344v1

Physics

Quantum Physics

4 figures, 2 tables plus supplementary material

Scientific paper

We use quantum process tomography to characterize a full universal set of all-microwave gates on two superconducting single-frequency single-junction transmon qubits. All extracted gate fidelities, including those for Clifford group generators, single-qubit pi/4 and pi/8 rotations, and a two-qubit controlled-NOT, exceed 95% (98%), without (with) accounting for state preparation and measurement errors. Furthermore, we introduce a process map representation in the Pauli basis which is visually efficient and informative. This high-fidelity gate set serves as another critical building block towards scalable architectures of superconducting qubits for error correction schemes.

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