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Regime shift of the hydroclimate-vegetation system in the Yellow River Delta of China from 1982 through 2015 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2020, 15 (2)
作者:  Niu, Beibei;  Zhang, Zixuan;  Yu, Xinyang;  Li, Xinju;  Wang, Zhen;  Loaiciga, Hugo A.;  Peng, Sha
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/02
regime shift  hydroclimate-vegetation system  time series decomposition  structural change  Yellow River Delta  
Nagaoka ferromagnetism observed in a quantum dot plaquette 期刊论文
NATURE, 2020, 579 (7800) : 528-533
作者:  Yu, Yong;  Ma, Fei;  Luo, Xi-Yu;  Jing, Bo;  Sun, Peng-Fei;  Fang, Ren-Zhou;  Yang, Chao-Wei;  Liu, Hui;  Zheng, Ming-Yang;  Xie, Xiu-Ping;  Zhang, Wei-Jun;  You, Li-Xing;  Wang, Zhen;  Chen, Teng-Yun;  Zhang, Qiang;  Bao, Xiao-Hui;  Pan, Jian-Wei
收藏  |  浏览/下载:31/0  |  提交时间:2020/07/03

A quantum dot device designed to host four electrons is used to demonstrate Nagaoka ferromagnetism-a model of itinerant magnetism that has so far been limited to theoretical investigation.


Engineered, highly controllable quantum systems are promising simulators of emergent physics beyond the simulation capabilities of classical computers(1). An important problem in many-body physics is itinerant magnetism, which originates purely from long-range interactions of free electrons and whose existence in real systems has been debated for decades(2,3). Here we use a quantum simulator consisting of a four-electron-site square plaquette of quantum dots(4) to demonstrate Nagaoka ferromagnetism(5). This form of itinerant magnetism has been rigorously studied theoretically(6-9) but has remained unattainable in experiments. We load the plaquette with three electrons and demonstrate the predicted emergence of spontaneous ferromagnetic correlations through pairwise measurements of spin. We find that the ferromagnetic ground state is remarkably robust to engineered disorder in the on-site potentials and we can induce a transition to the low-spin state by changing the plaquette topology to an open chain. This demonstration of Nagaoka ferromagnetism highlights that quantum simulators can be used to study physical phenomena that have not yet been observed in any experimental system. The work also constitutes an important step towards large-scale quantum dot simulators of correlated electron systems.


  
Escaping from pollution: the effect of air quality on inter-city population mobility in China 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2019, 14 (12)
作者:  Cui, Can;  Wang, Zhen;  He, Pan;  Yuan, Shanfeng;  Niu, Beibei;  Kang, Ping;  Kang, Chaogui
收藏  |  浏览/下载:13/0  |  提交时间:2020/02/17
air quality  population mobility  air pollution  cities  outdoor activities  
Estimating global surface ammonia concentrations inferred from satellite retrievals 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2019, 19 (18) : 12051-12066
作者:  Liu, Lei;  Zhang, Xiuying;  Wong, Anthony Y. H.;  Xu, Wen;  Liu, Xuejun;  Li, Yi;  Mi, Huan;  Lu, Xuehe;  Zhao, Limin;  Wang, Zhen;  Wu, Xiaodi;  Wei, Jing
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
Device-independent quantum random-number generation 期刊论文
NATURE, 2018, 562 (7728) : 548-+
作者:  Liu, Yang;  Zhao, Qi;  Li, Ming-Han;  Guan, Jian-Yu;  Zhang, Yanbao;  Bai, Bing;  Zhang, Weijun;  Liu, Wen-Zhao;  Wu, Cheng;  Yuan, Xiao;  Li, Hao;  Munro, W. J.;  Wang, Zhen;  You, Lixing;  Zhang, Jun;  Ma, Xiongfeng;  Fan, Jingyun;  Zhang, Qiang;  Pan, Jian-Wei
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
Generation of multicomponent atomic Schrodinger cat states of up to 20 qubits 期刊论文
SCIENCE, 2019, 365 (6453) : 574-577
作者:  Song, Chao;  Xu, Kai;  Li, Hekang;  Zhang, Yu-Ran;  Zhang, Xu;  Liu, Wuxin;  Guo, Qiujiang;  Wang, Zhen;  Ren, Wenhui;  Hao, Jie;  Feng, Hui;  Fan, Heng;  Zheng, Dongning;  Wang, Da-Wei;  Wang, H.;  Zhu, Shi-Yao
收藏  |  浏览/下载:10/0  |  提交时间:2019/11/27
主被动观测系统下云和气溶胶辐射偏振态逐阶演变机理研究 项目
项目编号:41871237; 经费:600000(CNY); 起止日期:2019 / dc_date_end
项目负责人:  王震
收藏  |  浏览/下载:6/0  |  提交时间:2019/11/27
Exposure to Secondhand Smoke and Arrhythmogenic Cardiac Alternans in a Mouse Model 期刊论文
ENVIRONMENTAL HEALTH PERSPECTIVES, 2018, 126 (12)
作者:  Wang, Zhen;  Wang, Lianguo;  Tapa, Srinivas;  Pinkerton, Kent E.;  Chen, Chao-Yin;  Ripplinger, Crystal M.
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/09
Child-trafficking networks of illegal adoption in China 期刊论文
NATURE SUSTAINABILITY, 2018, 1 (5) : 254-260
作者:  Wang, Zhen;  Wei, Liyuan;  Peng, Sha;  Deng, Liangchun;  Niu, Beibei
收藏  |  浏览/下载:8/0  |  提交时间:2020/08/19
Hygroscopic behavior of atmospheric aerosols containing nitrate salts and water-soluble organic acids 期刊论文
ATMOSPHERIC CHEMISTRY AND PHYSICS, 2018, 18 (7) : 5115-5127
作者:  Jing, Bo;  Wang, Zhen;  Tan, Fang;  Guo, Yucong;  Tong, Shengrui;  Wang, Weigang;  Zhang, Yunhong;  Ge, Maofa
收藏  |  浏览/下载:10/0  |  提交时间:2019/04/09