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Your search keyword '"WANG, Guoqing"' showing total 4,393 results
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4,393 results on '"WANG, Guoqing"'

158. Endovascular therapy in acute ischaemic stroke with large infarction with matched or mismatched clinical-radiological severities: a post-hoc analysis of the ANGEL-ASPECT trial

Author

Wang, Yongjun, Wang, Yilong, Liu, Liping, Liebeskind, David S., Miao, Zhongrong, Ren, Zeguang, Pereira, Vitor Mendes, Ji, Xunming, Dong, Qiang, Xu, Anding, Liu, Xinfeng, Yang, Qingwu, Jing (Chair), Jing, Zhang, Zhe, Zhang, Yingkui, Wu, Wei, Sun, Dapeng, Qi, Zhongqi, Li, Shuo, Liu, Zhenqiang, Yu, Zequan, Zhang, Jingyu, Chen, Fangguang, Li, Kangyue, Zhang, Kai, Hu, Mingkai, Liu (Chair), Jianmin, Yao, Chen, Chen, Kangning, Fang (Chair), Kun, Song, Bo, Dong, Yi, Huo, Xiaochuan, Ma, Gaoting, Yuan, Guangxiong, Han, Hongxing, Chen, Wenhuo, Wei, Ming, Zhang, Jiangang, Zhou, Zhiming, Yao, Xiaoxi, Wang, Guoqing, Song, Weigen, Cai, Xueli, Nan, Guangxian, Li, Di, Wang, Yizhou, Ling, Wentong, Cai, Chuwei, Wen, Changming, Wang, En, Zhang, Liyong, Jiang, Changchun, Liu, Yajie, Liao, Geng, Chen, Xiaohui, Li, Tianxiao, Liu, Shudong, Li, Jinglun, Sun, Yaxuan, Xu, Na, Gao, Zong’en, Ju, Dongsheng, Song, Cunfeng, Xuan, Jinggang, Zhou, Feng, Shi, Qing, Luo, Jun, Liu, Yan, Guo, Zaiyu, Li, Tong, Zheng, Hongbo, Dai, Linzhi, Zhao, Junfeng, Gui, Liqiang, Geng, Xiaokun, Tang, Yufeng, Yin, Congguo, Yang, Hua, An, Ruiyang, Sun, Yuying, Wu, Yanan, Yu, Chunlai, Zheng, Shuangcheng, Pan, Yuesong, Jin, Aoming, Xiang, Xianglong, Wang, Mengxing, Yan, Hongyi, He, Yuanling, Li, Chunyang, Kong, Weixia, Chen, Yuhuan, Guo, Chenhao, Ji, Fengjie, Ji, Pengshan, Liu, Lei, Lu, Xinghua, Luo, Guangkuo, Wang, Nanjing, Zhang, Yu, Liu, Bo, Yang, Jian, Deng, Jingjing, Wang, Juan, Wang, Wanru, Yu, Hang, Cui, Le, Liu, Wenwen, Wang, Ziyong, Zhao, Xia, Zhou, Zhou, Yi-Chou Wang, Alvin, Zheng, Lina, Nie, Ximing, Liu, Xin, Duan, Wanying, Liu, Jingyi, Wei, Yufei, Wen, Miao, Yang, Zhonghua, Leung, Thomas W., Nguyen, Thanh N., and Leng, Xinyi

Published
2024
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176. Observation of symmetry-protected selection rules in periodically driven quantum systems

Author

Wang, Guoqing, Li, Changhao, and Cappellaro, Paola

Subjects
Quantum Physics, Physics - Atomic Physics
Abstract

Periodically driven quantum systems, known as Floquet systems, have been a focus of non-equilibrium physics in recent years, thanks to their rich dynamics. Not only time-periodic systems exhibit symmetries similar to those in spatially periodic systems, but they also display novel behavior due to symmetry breaking. Characterizing such dynamical symmetries is crucial, but the task is often challenging, due to limited driving strength and the lack of an experimentally accessible characterization protocol. Here, we show how to characterize dynamical symmetries including parity, rotation, and particle-hole symmetry by observing the symmetry-induced selection rules between Floquet states. Specifically, we exploit modulated quantum driving to reach the strong light-matter coupling regime and we introduce a protocol to experimentally extract the transition elements between Floquet states from the coherent evolution of the system. Using the nitrogen-vacancy center in diamond as an experimental testbed, we apply our methods to observe symmetry-protected dark states and dark bands, and the coherent destruction of tunneling effect. Our work shows how to exploit the quantum control toolkit to study dynamical symmetries that can arise in topological phases of strongly-driven Floquet systems.

Published
2021
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177. Nanoscale vector AC magnetometry with a single nitrogen-vacancy center in diamond

Author

Wang, Guoqing, Liu, Yi-Xiang, Zhu, Yuan, and Cappellaro, Paola

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Applied Physics, Quantum Physics
Abstract

Detection of AC magnetic fields at the nanoscale is critical in applications ranging from fundamental physics to materials science. Isolated quantum spin defects, such as the nitrogen-vacancy center in diamond, can achieve the desired spatial resolution with high sensitivity. Still, vector AC magnetometry currently relies on using different orientations of an ensemble of sensors, with degraded spatial resolution, and a protocol based on a single NV is lacking. Here we propose and experimentally demonstrate a protocol that exploits a single NV to reconstruct the vectorial components of an AC magnetic field by tuning a continuous driving to distinct resonance conditions. We map the spatial distribution of an AC field generated by a copper wire on the surface of the diamond. The proposed protocol combines high sensitivity, broad dynamic range, and sensitivity to both coherent and stochastic signals, with broad applications in condensed matter physics, such as probing spin fluctuations.

Published
2021
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178. Bayesian Functional Registration of fMRI Activation Maps

Author

Wang, Guoqing, Datta, Abhirup, and Lindquist, Martin A.

Subjects
Statistics - Applications
Abstract

Functional magnetic resonance imaging (fMRI) has provided invaluable insight into our understanding of human behavior. However, large inter-individual differences in both brain anatomy and functional localization after anatomical alignment remain a major limitation in conducting group analyses and performing population-level inference. This paper addresses this problem by developing and validating a new computational technique for reducing misalignment across individuals in functional brain systems by spatially transforming each subject's functional data to a common reference map. Our proposed Bayesian functional registration approach allows us to assess differences in brain function across subjects and individual differences in activation topology. It combines intensity-based and feature-based information into an integrated framework and allows inference to be performed on the transformation via the posterior samples. We evaluate the method in a simulation study and apply it to data from a study of thermal pain. We find that the proposed approach provides increased sensitivity for group-level inference.

Published
2021

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