Transport and impurity dynamics in a unitary Fermi gas

该项目旨在产生新的理解的运输和行为的杂质在气体中的强相互作用的原子冷却到nanoKelvin温度。通过测量幺正费米气体对具有明确定义的动量和能量的扰动的响应，我们将映射超流和正常流体相中的元激发。由此，可以确定定义颗粒和杂质如何穿过系统的参数。我们的研究将揭示酉费米气体是否接近完美流动性的量子极限，研究气体的性质如何取决于杂质浓度，并为强相关量子物质理论建立新的基准。

This project aims to generate new understandings of transport and the behaviour of impurities in a gas of strongly-interacting atoms cooled to nanoKelvin temperatures. By measuring the response of a unitary Fermi gas to disturbances with well-defined momenta and energies, we will map the elementary excitations in both the superfluid and normal fluid phases. From this, the parameters that define how particles and impurities travel through the system can be determined. Our study will reveal whether the unitary Fermi gas approaches a conjectured quantum limit for perfect fluidity, examine how the properties of the gas depend on impurity concentration and establish new benchmarks for theories of strongly-correlated quantum matter.