论文标题
临界温度附近的统一费米超流体：基本激发的热力学和声音模式
Unitary Fermi superfluid near the critical temperature: thermodynamics and sound modes from elementary excitations
论文作者
论文摘要
我们将最新的实验结果[科学结果[Science 375，528（2022）]与临界温度附近的超流体单位费米气体与基于系统基本激发的热力学模型进行了比较。我们发现实验数据与我们的理论之间的一致性非常好，例如第一声音，第二声音和超流体分数。我们还表明，在第一声音和第二个声音之间进行模式混合。最后，我们表征了对密度扰动的响应幅度：通过密度扰动，可以激发接近临界温度的第一和第二声音，而在较低温度下，只有第一个声音模式显示出明显的响应。
We compare recent experimental results [Science 375, 528 (2022)] of the superfluid unitary Fermi gas near the critical temperature with a thermodynamic model based on elementary excitations of the system. We find very good agreement between experimental data and our theory for several quantities such as first sound, second sound, and superfluid fraction. We also show that mode mixing between first and second sound occurs. Finally, we characterize the response amplitude to a density perturbation: close to the critical temperature both first and second sound can be excited through a density perturbation, whereas at lower temperatures only the first sound mode exhibits a significant response.
