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Signatures of self-organized criticality in an ultracold atomic gas 期刊论文
NATURE, 2020, 577 (7791) : 481-+
作者:  MacPherson, Laura;  Anokye, Juliana;  Yeung, Miriam M.;  Lam, Enid Y. N.;  Chan, Yih-Chih;  Weng, Chen-Fang;  Yeh, Paul;  Knezevic, Kathy;  Butler, Miriam S.;  Hoegl, Annabelle;  Chan, Kah-Lok;  Burr, Marian L.;  Gearing, Linden J.;  Willson, Tracy;  Liu, Joy;  Choi, Jarny;  Yang, Yuqing;  Bilardi, Rebecca A.;  Falk, Hendrik;  Nghi Nguyen;  Stupple, Paul A.;  Peat, Thomas S.;  Zhang, Ming;  De Silva, Melanie;  Carrasco-Pozo, Catalina;  Avery, Vicky M.;  Khoo, Sim;  Dolezal, Olan;  Dennis, Matthew L.;  Nuttall, Stewart;  Surjadi, Regina;  Newman, Janet;  Ren, Bin;  Leaver, David J.;  Sun, Yuxin;  Baell, Jonathan B.;  Dovey, Oliver;  Vassiliou, George S.;  Grebien, Florian;  Dawson, Sarah-Jane;  Street, Ian P.;  Monahan, Brendon J.;  Burns, Christopher J.;  Choudhary, Chunaram;  Blewitt, Marnie E.;  Voss, Anne K.;  Thomas, Tim;  Dawson, Mark A.
收藏  |  浏览/下载:56/0  |  提交时间:2020/07/03

Self-organized criticality is an elegant explanation of how complex structures emerge and persist throughout nature(1), and why such structures often exhibit similar scale-invariant properties(2-9). Although self-organized criticality is sometimes captured by simple models that feature a critical point as an attractor for the dynamics(10-15), the connection to real-world systems is exceptionally hard to test quantitatively(16-21). Here we observe three key signatures of self-organized criticality in the dynamics of a driven-dissipative gas of ultracold potassium atoms: self-organization to a stationary state that is largely independent of the initial conditions  scale-invariance of the final density characterized by a unique scaling function  and large fluctuations of the number of excited atoms (avalanches) obeying a characteristic power-law distribution. This work establishes a well-controlled platform for investigating self-organization phenomena and non-equilibrium criticality, with experimental access to the underlying microscopic details of the system.


A driven-dissipative gas of ultracold potassium atoms is used to demonstrate three key signatures of self-organized criticality, and provides a system in which the phenomenon can be experimentally tested.


  
Size of the Atmospheric Blocking Events: Scaling Law and Response to Climate Change 期刊论文
GEOPHYSICAL RESEARCH LETTERS, 2019, 46 (22) : 13488-13499
作者:  Nabizadeh, Ebrahim;  Hassanzadeh, Pedram;  Yang, Da;  Barnes, Elizabeth A.
收藏  |  浏览/下载:15/0  |  提交时间:2020/02/17
blocking events  extreme events  climate change  scaling law  midlatitude circulation  hierarchical modeling  
Role of surface and subsurface processes in scaling N2O emissions along riverine networks 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2017, 114 (17) : 4330-4335
作者:  Marzadri, Alessandra;  Dee, Martha M.;  Tonina, Daniele;  Bellin, Alberto;  Tank, Jennifer L.
收藏  |  浏览/下载:18/0  |  提交时间:2019/11/27
riverine networks  greenhouse gas  N2O  emission scaling law  N2O emission potentials  
Collaborative Research: failure of RockMasses from Nucleation and Growth of Microscopic Defects and Disorder 科技报告
来源:US Department of Energy (DOE). 出版年: 2016
作者:  Klein, William
收藏  |  浏览/下载:15/0  |  提交时间:2019/04/05
Homogeneous nucleation  heterogeneous nucleation  fluctuations  defects  asperities  Gutenburg-Richter scaling  Omori's law  aftershocks