Observation of scale invariance and universality in two-dimensional Bose gases

Chen-Lung Hung (), Xibo Zhang, Nathan Gemelke and Cheng Chin
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Chen-Lung Hung: University of Chicago
Xibo Zhang: University of Chicago
Nathan Gemelke: University of Chicago
Cheng Chin: University of Chicago

Nature, 2011, vol. 470, issue 7333, 236-239

Abstract: Critical observations The Berezinskii–Kosterlitz–Thouless phase transition, occurring in two-dimensional Bose gases, is expected to show an extended range of universal scaling behaviour in thermodynamic quantities. A clear demonstration of this 'critical' behaviour has remained elusive, but now Chen-Lung Hung et al. confirm its existence through in situ density and density-fluctuation measurements of two-dimensional caesium Bose gases at different temperatures and interaction strengths.

Date: 2011
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DOI: 10.1038/nature09722

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