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Trapped Ion Quantum Computing Superconducting Qubits

Experimental realization of a fast controlled-Z gate via a shortcut-to-adiabaticity

arXiv

Authors: Tenghui Wang, Zhenxing Zhang, Liang Xiang, Zhilong Jia, Peng Duan, Zhiwen Zong, Zhenhai Sun, Zhangjingzi Dong, Jianlan Wu, Yi Yin, Guoping Guo

Year

2018

Paper ID

23241

Status

Preprint

Abstract Read

~2 min

Abstract Words

108

Citations

N/A

Abstract

For a frequency-tunable two-qubit system, a controlled-Z (CZ) gate can be realized by adiabatically driving the qubit system through an avoided level crossing between an auxiliary state and computational levels. Here, we theoretically propose a fast CZ gate using a shortcut-to-adiabaticity (STA). Experimentally, the STA CZ gate is implemented with a 52 ns control pulse for two coupled superconducting Xmon qubits. Measured fidelity of the STA CZ gate is higher than 96.0%, in both quantum process tomography and randomized benchmarking. The protocol allows a flexible design of the evolution time and control waveform. We suggest that this `fast adiabatic' CZ gate can be directly applied to other multi-qubit quantum systems.

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For a frequency-tunable two-qubit system, a controlled-Z (CZ) gate can be realized by adiabatically driving the qubit system through an avoided level crossing between an...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1811.08096 [2] arXiv https://arxiv.org/abs/1811.08096 [3] Publisher https://arxiv.org/abs/1811.08096

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