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Coupled Dipole Oscillations of a Mass-Imbalanced Bose and Fermi Superfluid Mixture | | Yu-Ping Wu
; Xing-Can Yao
; Xiang-Pei Liu
; Xiao-Qiong Wang
; Yu-Xuan Wang
; Hao-Ze Chen
; Youjin Deng
; Yu-Ao Chen
; Jian-Wei Pan
; | | Date: |
12 May 2017 | | Abstract: | Recent experimental realizations of superfluid mixtures of Bose and Fermi
quantum gases provide a unique platform for exploring diverse superfluid
phenomena. We study dipole oscillations of a double superfluid in a
cigar-shaped optical dipole trap, consisting of $^{41}$K and $^{6}$Li atoms
with a large mass imbalance, where the oscillations of the bosonic and
fermionic components are coupled via the Bose-Fermi interaction. In our
high-precision measurements, the frequencies of both components are observed to
be shifted from the single-species ones, and exhibit unusual features. The
frequency shifts of the $^{41}$K component are upward (downward) in the radial
(axial) direction, whereas the $^{6}$Li component has down-shifted frequencies
in both directions. Most strikingly, as the interaction strength is varied, the
frequency shifts display a resonant-like behavior in both directions, for both
species, and around a similar location at the BCS side of fermionic superfluid.
These rich phenomena challenge theoretical understanding of superfluids. | | Source: | arXiv, 1705.4496 | | Services: | Forum | Review | PDF | Favorites | |
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