Related Experiment Video
Updated: Mar 29, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Nonhydrodynamic Transport in Trapped Unitary Fermi Gases
Jasmine Brewer1, Paul Romatschke1
1University of Colorado at Boulder, Boulder, Colorado 80303, USA.
Abstract:
Many strongly coupled fluids are known to share similar hydrodynamic transport properties. In this work we argue that this similarity could extend beyond hydrodynamics to transient dynamics through the presence of nonhydrodynamic modes. We review nonhydrodynamic modes in kinetic theory and gauge-gravity duality and discuss their signatures in trapped Fermi gases close to unitarity. Reanalyzing previously published experimental data we find hints of nonhydrodynamic modes in cold Fermi gases in two and three dimensions.
Related Concept Videos
Carrier Transport
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Atomic Nuclei: Nuclear Spin State Population Distribution
The Kinetic Model of Gases
First Law: Particles in One-dimensional Equilibrium
Fermi Level Dynamics
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
Kinetic Theory of an Ideal Gas
The number of molecules in one mole is called...

