Correction of microwave pulse reflection by digital filters in superconducting quantum circuits

被引：0

作者：

郭亮亮 ^{[1
,2
]}

段鹏 ^{[1
,2
]}

杜磊 ^{[1
,2
]}

张海峰 ^{[1
,2
]}

陶浩然 ^{[1
,2
]}

陈勇 ^{[1
,2
]}

杨小燕 ^{[1
,2
]}

张驰 ^{[3
]}

贾志龙 ^{[3
]}

孔伟成 ^{[3
]}

陈昭昀 ^{[4
]}

郭国平 ^{[1
,2
,3
]}

机构：

[1] CAS Key Laboratory of Quantum Information, University of Science and Technology of China

[2] CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China

[3] Origin Quantum Computing Company Limited

[4] Institute of Artificial Intelligence, Hefei Comprehensive National Science

来源：

Chinese Physics B | 2024年 / 33卷 / 09期

关键词：

D O I：

暂无

中图分类号：

O413 [量子论]; TN713 [滤波技术、滤波器];

学科分类号：

摘要：

Reducing the control error is vital for high-fidelity digital and analog quantum operations. In superconducting circuits,one disagreeable error arises from the reflection of microwave signals due to impedance mismatch in the control chain. Here,we demonstrate a reflection cancelation method when considering that there are two reflection nodes on the control line.We propose to generate the pre-distortion pulse by passing the envelopes of the microwave signal through digital filters,which enables real-time reflection correction when integrated into the field-programmable gate array(FPGA). We achieve a reduction of single-qubit gate infidelity from 0.67% to 0.11% after eliminating microwave reflection. Real-time correction of microwave reflection paves the way for precise control and manipulation of the qubit state and would ultimately enhance the performance of algorithms and simulations executed on quantum processors.

引用

页码：121 / 127

页数：7

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