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1,452 results on '"Wang, Ximing"'

1. Variational Quantum Circuit Decoupling

Author

Wang, Ximing, Yang, Chengran, and Gu, Mile

Subjects
Quantum Physics
Abstract

Decoupling systems into independently evolving components has a long history of simplifying seemingly complex systems. They enable a better understanding of the underlying dynamics and causal structures while providing more efficient means to simulate such processes on a computer. Here we outline a variational decoupling algorithm for decoupling unitary quantum dynamics -- allowing us to decompose a given $n$-qubit unitary gate into multiple independently evolving sub-components. We apply this approach to quantum circuit synthesis - the task of discovering quantum circuit implementations of target unitary dynamics. Our numerical studies illustrate significant benefits, showing that variational decoupling enables us to synthesize general $2$ and $4$-qubit gates to fidelity that conventional variational circuits cannot reach.

Published
2024

21. Quantum Uncertainty Principles for Measurements with Interventions

Author

Xiao, Yunlong, Yang, Yuxiang, Wang, Ximing, Liu, Qing, and Gu, Mile

Subjects
Quantum Physics
Abstract

Heisenberg's uncertainty principle implies fundamental constraints on what properties of a quantum system can we simultaneously learn. However, it typically assumes that we probe these properties via measurements at a single point in time. In contrast, inferring causal dependencies in complex processes often requires interactive experimentation - multiple rounds of interventions where we adaptively probe the process with different inputs to observe how they affect outputs. Here we demonstrate universal uncertainty principles for general interactive measurements involving arbitrary rounds of interventions. As a case study, we show that they imply an uncertainty trade-off between measurements compatible with different causal dependencies., Comment: 7 pages (main text) + 47 pages (supplemental material), 5 figures (main text) + 17 figures (supplemental material). Accepted for publication in Physical Review Letters

Published
2023
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24. Game-theoretic Learning Anti-jamming Approaches in Wireless Networks

Author

Jia, Luliang, Qi, Nan, Chu, Feihuang, Fang, Shengliang, Wang, Ximing, Ma, Shuli, and Feng, Shuo

Subjects
Computer Science - Networking and Internet Architecture, Computer Science - Computer Science and Game Theory
Abstract

In this article, the anti-jamming communication problem is investigated from a game-theoretic learning perspective. By exploring and analyzing intelligent anti-jamming communication, we present the characteristics of jammers and the requirements of an intelligent anti-jamming approach. Such approach is required of self-sensing, self-decision making, self-coordination, self-evaluation, and learning ability. Then, a game-theoretic learning anti-jamming (GTLAJ) paradigm is proposed, and its framework and challenges of GTLAJ are introduced. Moreover, through three cases, i.e., Stackelberg anti-jamming game, Markov anti-jamming game and hypergraph-based anti-jamming game, different anti-jamming game models and applications are discussed, and some future directions are presented., Comment: Published in IEEE Communcations Magazine

Published
2022

38. Upregulation of WDR6 drives hepatic de novo lipogenesis in insulin resistance in mice

Author

Yao, Zhenyu, Gong, Ying, Chen, Wenbin, Shao, Shanshan, Song, Yongfeng, Guo, Honglin, Li, Qihang, Liu, Sijin, Wang, Ximing, Zhang, Zhenhai, Wang, Qian, Xu, Yunyun, Wu, Yingjie, Wan, Qiang, Zhao, Xinya, Xuan, Qiuhui, Wang, Dawei, Lin, Xiaoyan, Xu, Jiawen, Liu, Jun, Proud, Christopher G., Wang, Xuemin, Yang, Rui, Fu, Lili, Niu, Shaona, Kong, Junjie, Gao, Ling, Bo, Tao, and Zhao, Jiajun

Published
2023
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46. Genetic Factors, Brain Atrophy, and Response to Rehabilitation Therapy After Stroke

Author

Cramer, Steven C, See, Jill, Liu, Brent, Edwardson, Matthew, Wang, Ximing, Radom-Aizik, Shlomit, Haddad, Fadia, Shahbaba, Babak, Wolf, Steven L, Dromerick, Alexander W, and Winstein, Carolee J

Subjects
Biomedical and Clinical Sciences, Neurosciences, Stroke, Aging, Rehabilitation, Genetics, Brain Disorders, Clinical Research, 2.1 Biological and endogenous factors, Aetiology, Neurological, Aged, Apolipoprotein E4, Atrophy, Biomarkers, Brain-Derived Neurotrophic Factor, Endophenotypes, Female, Humans, Male, Middle Aged, Neuroimaging, Outcome Assessment, Health Care, Stroke Rehabilitation, stroke, rehabilitation, imaging, genetics, biomarker, endophenotype, Clinical Sciences, Cognitive Sciences
Abstract

ObjectivePatients show substantial differences in response to rehabilitation therapy after stroke. We hypothesized that specific genetic profiles might explain some of this variance and, secondarily, that genetic factors are related to cerebral atrophy post-stroke.MethodsThe phase 3 ICARE study examined response to motor rehabilitation therapies. In 216 ICARE enrollees, DNA was analyzed for presence of the BDNF val66met and the ApoE ε4 polymorphism. The relationship of polymorphism status to 12-month change in motor status (Wolf Motor Function Test, WMFT) was examined. Neuroimaging data were also evaluated (n=127).ResultsSubjects were 61±13 years old (mean±SD) and enrolled 43±22 days post-stroke; 19.7% were BDNF val66met carriers and 29.8% ApoE ε4 carriers. Carrier status for each polymorphism was not associated with WMFT, either at baseline or over 12 months of follow-up. Neuroimaging, acquired 5±11 days post-stroke, showed that BDNF val66met polymorphism carriers had a 1.34-greater degree of cerebral atrophy compared to non-carriers (P=.01). Post hoc analysis found that age of stroke onset was 4.6 years younger in subjects with the ApoE ε4 polymorphism (P=.02).ConclusionNeither the val66met BDNF nor ApoE ε4 polymorphism explained inter-subject differences in response to rehabilitation therapy. The BDNF val66met polymorphism was associated with cerebral atrophy at baseline, echoing findings in healthy subjects, and suggesting an endophenotype. The ApoE ε4 polymorphism was associated with younger age at stroke onset, echoing findings in Alzheimer's disease and suggesting a common biology. Genetic associations provide insights useful to understanding the biology of outcomes after stroke.

Published
2022

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