Robust single-qubit gates by composite pulses in three-level systems
- URL: http://arxiv.org/abs/2012.02330v2
- Date: Tue, 11 May 2021 11:10:13 GMT
- Title: Robust single-qubit gates by composite pulses in three-level systems
- Authors: Zhi-Cheng Shi, Hai-Ning Wu, Li-Tuo Shen, Yan Xia, X. X. Yi, and
Shi-Biao Zheng
- Abstract summary: In this work, we derive the form of the composite pulse sequence to implement robust single-qubit gates in a three-level system.
We find that the three-pulse sequence cannot completely eliminate the first order of systematic errors, but still availably makes the fidelity resistant to variations in a specific direction.
- Score: 2.9527449434851336
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Composite pulses are an efficient tool for robust quantum control. In this
work, we derive the form of the composite pulse sequence to implement robust
single-qubit gates in a three-level system, where two low-energy levels act as
a qubit. The composite pulses can efficiently cancel the systematic errors up
to a certain order. We find that the three-pulse sequence cannot completely
eliminate the first order of systematic errors, but still availably makes the
fidelity resistant to variations in a specific direction. When employing more
pulses in the sequence ($N>3$), the fidelity can be insensitive to the
variations in all directions and the robustness region becomes much wider.
Finally we demonstrate the applications of composite pulses in quantum
information processing, e.g., robust quantum information transfer between two
qubits.
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