Viscosity-Entropy Ratio of the Unitary Fermi Gas from Zero-Temperature Elementary Excitations

被引：0
作者：
Luca Salasnich
Flavio Toigo
机构：
[1] Università di Padova,Dipartimento di Fisica “Galileo Galilei” and CNISM
来源：
Journal of Low Temperature Physics | 2011年 / 165卷
关键词：
Unitary Fermi gas; Viscosity; Entropy;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We investigate the low-temperature behavior of the ratio between the shear viscosity η and the entropy density s in the unitary Fermi gas by using a model based on the zero-temperature spectra of both bosonic collective modes and fermonic single-particle excitations. Our theoretical curve of η/s as a function of the temperature T is in qualitative agreement with the experimental data of trapped ultracold 6Li atomic gases. We find the minimum value η/s≃0.44 (in units of ħ/kB) at the temperature T/TF≃0.27, with TF the Fermi temperature.
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页码：239 / 248
页数：9
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