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arXiv:1512.08654 · The European Physical Journal Plus

Interference effect of critical ultra-cold atomic Bose gases

Xuguang Yue, Shujuan Liu, Hongwei Xiong

Published Feb 1, 2016• 0 citations
arXivHTMLPDF
DOI
10.1140/epjp/i2016-16029-3

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The transition from a thermal cloud to a Bose–Einstein condensate (BEC) in an interacting ultra-cold Bose gas is a prototype in a universality class of diverse phase transitions. For a trapped ultra-cold Bose gas, we were able to study the critical regime both above and below the critical temperature with a Talbot–Lau interferometer, observing a peak in the correlation length. From this peak, we managed to determine the universal critical exponents for this phase transition as well as the finite-size and interaction corrections to the critical temperature. The results are all in quantitative agreement with theory. This work demonstrates the potential application of the Talbot–Lau interferometer to a wide range of critical phase transitions in ultra-cold atomic gases.