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Dynamic formation of quasicondensate and spontaneous vortices in a strongly interacting Fermi gas by Liu, Xiang-Pei; Yao, Xing-Can; Deng, Youjin; Wang, Yu-Xuan; Wang, Xiao-Qiong; Li, Xiao-Peng; Chen, Qijin; Chen, Yu-Ao; Pan, Jian-Wei is a scholarly article available to read on EtoBox.

What is Dynamic formation of quasicondensate and spontaneous vortices in a strongly interacting Fermi gas about?

We report an experimental study of quench dynamics across the superfluid transition temperature $T_c$ in a strongly interacting Fermi gas by ramping down the trapping potential. The nonzero quasi-condensate number $N_0$ at temperature significantly above $T_c$ in the unitary and the BEC regimes reveals the pseudogap physics. Below $T_c$, a rapid growth of $N_0$ is accompanied by spontaneous generation of tens of vortices. We observe a power law scaling of the vortex density versus the quasi-condensate formation time, consistent with the Kibble-Zurek theory. Our work provides an example of studying emerged many-body physics by quench dynamics and paves the way for studying the quantum turbulence in a strongly interacting Fermi gas.

Author

Liu, Xiang-Pei; Yao, Xing-Can; Deng, Youjin; Wang, Yu-Xuan; Wang, Xiao-Qiong; Li, Xiao-Peng; Chen, Qijin; Chen, Yu-Ao; Pan, Jian-Wei

Published

2019

Language

EN