Shear Viscosity of a Unitary Fermi Gas Near the Superfluid Phase Transition

We measure the shear viscosity for a resonantly interacting Fermi gas as a function of temperature from nearly the ground state through the superfluid phase transition into the high temperature regime. Further, we demonstrate an iterative method to estimate the local shear viscosity coefficient α(S)...

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Veröffentlicht in:	Physical review letters 2015-07, Vol.115 (2), p.020401-020401, Article 020401
Hauptverfasser:	Joseph, J A, Elliott, E, Thomas, J E
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Sprache:	eng
Schlagworte:	Brackets Estimates Fluids Ground state Iterative methods Phase transformations Shear viscosity Superfluidity
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container_title	Physical review letters
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creator	Joseph, J A Elliott, E Thomas, J E
description	We measure the shear viscosity for a resonantly interacting Fermi gas as a function of temperature from nearly the ground state through the superfluid phase transition into the high temperature regime. Further, we demonstrate an iterative method to estimate the local shear viscosity coefficient α(S)(θ) versus reduced temperature θ from the cloud-averaged measurements ⟨α(S)⟩, and compare α(S) to several microscopic theories. We find that α(S) reveals features that were previously hidden in ⟨α(S)⟩.
doi_str_mv	10.1103/physrevlett.115.020401
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subjects	Brackets Estimates Fluids Ground state Iterative methods Phase transformations Shear viscosity Superfluidity
title	Shear Viscosity of a Unitary Fermi Gas Near the Superfluid Phase Transition
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