Sound in a Unitary Fermi Gas
ORAL
Abstract
Low temperature thermodynamics and transport properties of systems ranging from solids to quantum gases are determined by phonons (sound). We measure important properties of phonons in a homogeneous unitary Fermi gas, including its dispersion relation and quantum limited attenuation. We present our measurements of the sound diffusion coefficient, a quantity which fully characterizes sound attenuation, and is closely related to viscosity and thermal conductivity of the Fermi gas.
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