caa a22 4500 445366532 CHVBK 20180317142932.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10909-011-0391-8 doi (NATIONALLICENCE)springer-10.1007/s10909-011-0391-8 Viscosity-Entropy Ratio of the Unitary Fermi Gas from Zero-Temperature Elementary Excitations [Elektronische Daten] [Luca Salasnich, Flavio Toigo] 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/k B ) at the temperature T/T F ≃0.27, with T F the Fermi temperature. Springer Science+Business Media, LLC, 2011 Unitary Fermi gas nationallicence Viscosity nationallicence Entropy nationallicence Salasnich Luca Dipartimento di Fisica "Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35122, Padova, Italy aut Toigo Flavio Dipartimento di Fisica "Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35122, Padova, Italy aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 165/5-6(2011-12-01), 239-248 0022-2291 165:5-6<239 2011 165 10909 https://doi.org/10.1007/s10909-011-0391-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-011-0391-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Salasnich Luca Dipartimento di Fisica "Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35122, Padova, Italy aut NATIONALLICENCE 700 1- Toigo Flavio Dipartimento di Fisica "Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35122, Padova, Italy aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 165/5-6(2011-12-01), 239-248 0022-2291 165:5-6<239 2011 165 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer