Ratio of shear viscosity to entropy density for trapped fermions in the unitarity limit
Journal Article
·
· Physical Review. A
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States)
We extract the shear viscosity to entropy density ratio {eta}/s of cold fermionic atoms in the unitarity limit from experimental data on the damping of collective excitations. We find that near the critical temperature {eta}/s is roughly equal to 1/2 in units of ({Dirac_h}/2{pi})/k{sub B}. With the possible exception of the quark gluon plasma, this value is closer to the conjectured lower bound 1/(4{pi}) than any other known liquid.
- OSTI ID:
- 21140690
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 6 Vol. 76; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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