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Enhancing Quantum Control by Improving Shaped-Pulse Generation

delete2020-05-22
delete7
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OA
AI
J
John P. S. Peterson *
S
Sarthour, Roberto S.
L
Laflamme, Raymond
DOI:10.1103/PhysRevApplied.13.054060delete
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摘要

摘要

En 中文
Most quantum processors requires pulse sequences for controlling quantum states. Here we present an alternative algorithm for computing an optimal pulse sequence so as to perform a specific task, being an implementation of a quantum gate or a quantum-state preparation. In our method, we reduce greatly the number of parameters to be fitted by using a limited number of functions as the modulations for the amplitude and phase of the radio-frequency pulses. Unlike other algorithms, ours uses some approximations to make it fast and scalable, and uses some efficient methods to obtain pulses that are robust to common types of experimental errors. We demonstrate the success of the proposed algorithm by performing several real experiments for 4-, 7-, and 12-quantum-bit systems using NMR. In addition, we show the efficiency of the algorithm, finding pulses for controlling with good fidelity the quantum states of spins in fictional square two-dimensional lattices containing 16, 36, and 100 qubits.
Keyword:
SPIN

期刊

Physical Review Applied 封面图
Physical Review Applied
IF:
4.4
论文数:
7.1K
被引数:
2.8W

机构

C
centro brasileiro de pesquisas fisicas
学者数:
1.5K
论文数: 2.3K
被引数: 0
U
University of Waterloo
学者数:
2.2W
论文数: 2.3W
被引数: 3.3W
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