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DOI | 10.1016/j.scib.2019.10.022 |
Oscillatory-like expansion of a Fermionic superfluid | |
Wang X.-Q.; Wu Y.-P.; Liu X.-P.; Wang Y.-X.; Chen H.-Z.; Maraj M.; Deng Y.; Yao X.-C.; Chen Y.-A.; Pan J.-W. | |
发表日期 | 2020 |
ISSN | 20959273 |
起始页码 | 7 |
结束页码 | 11 |
卷号 | 65期号:1 |
英文摘要 | We study the expansion behaviors of a Fermionic superfluid in a cigar-shaped optical dipole trap for the whole BEC-BCS crossover and various temperatures. At low temperature (0.06(1)TF), the atom cloud undergoes an anisotropic hydrodynamic expansion over 30 ms, which behaves like oscillation in the horizontal plane. By analyzing the expansion dynamics according to the superfluid hydrodynamic equation, the effective polytropic index γ¯ of Equation-of-State (EoS) of Fermionic superfluid is extracted. The γ¯ values show a non-monotonic behavior over the BEC-BCS crossover, and have a good agreement with the theoretical results in the unitarity and BEC side. The normalized quasi-frequencies of the oscillatory expansion are measured, which drop significantly from the BEC side to the BCS side and reach a minimum value of 1.73 around 1/kFa=-0.25. Our work improves the understanding of the dynamic properties of strongly interacting Fermi gas. © 2019 Science China Press |
关键词 | BEC-BCS crossoverEquation-of-StateFermionic superfluidOscillatory-like expansion |
英文关键词 | Electron gas; Expansion; Fermi level; Fermions; Hydrodynamics; Temperature; BEC-BCS crossover; Equation of state; Expansion behavior; Expansion dynamics; Fermionic superfluid; Hydrodynamic expansion; Optical dipole traps; Superfluid hydrodynamics; Equations of state |
语种 | 英语 |
来源期刊 | Science Bulletin |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/207221 |
作者单位 | Shanghai Branch, National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Shanghai, 201315, China; CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China |
推荐引用方式 GB/T 7714 | Wang X.-Q.,Wu Y.-P.,Liu X.-P.,et al. Oscillatory-like expansion of a Fermionic superfluid[J],2020,65(1). |
APA | Wang X.-Q..,Wu Y.-P..,Liu X.-P..,Wang Y.-X..,Chen H.-Z..,...&Pan J.-W..(2020).Oscillatory-like expansion of a Fermionic superfluid.Science Bulletin,65(1). |
MLA | Wang X.-Q.,et al."Oscillatory-like expansion of a Fermionic superfluid".Science Bulletin 65.1(2020). |
条目包含的文件 | 条目无相关文件。 |
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