Giant vortex clusters in a two-dimensional quantum fluid

@article{Gauthier2019GiantVC,
  title={Giant vortex clusters in a two-dimensional quantum fluid},
  author={G. Gauthier and M. Reeves and X. Yu and Ashton S. Bradley and M. Baker and T. Bell and H. Rubinsztein-Dunlop and Matthew J. Davis and T. Neely},
  journal={Science},
  year={2019},
  volume={364},
  pages={1264 - 1267}
}
Clustering vortices Many-body systems generally become more disordered as more energy is pumped into them. A curious exception to this rule was predicted in the context of turbulent flow by the physical chemist Lars Onsager. He suggested that the entropy of certain two-dimensional (2D) systems can decrease with increasing energy, corresponding to an effective negative temperature. Using 2D Bose-Einstein condensates of atoms, Gauthier et al. and Johnstone et al. put Onsager's theory to the test… Expand

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