Observation of shock waves in a strongly interacting Fermi gas

Abstract

We study collisions between two strongly interacting atomic Fermi gas clouds. We observe exotic nonlinear hydrodynamic behavior, distinguished by the formation of a very sharp and stable density peak as the clouds collide and subsequent evolution into a box-like shape. We model the nonlinear dynamics of these collisions using quasi-1D hydrodynamic equations. Our simulations of the time-dependent density profiles agree very well with the data and provide clear evidence of shock wave formation in this universal quantum hydrodynamic system.

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• Observation of interference between two molecular Bose-Einstein condensates
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• Colliding clouds of strongly interacting spin-polarized fermions
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• Viscous Dissipation in One-Dimensional Quantum Liquids
• Harmonically confined long-ranged interacting gas in the presence of a hard wall
• Phase-induced transport in atomic gases: from superfluid to Mott insulator
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• Tan's contact and the phase distribution of repulsive Fermi gases: Insights from QCD noise analyses
• Finite temperature equilibrium density profiles of integrable systems in confining potentials
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• Dispersive effects in the unitary Fermi gas
• Critical velocity, vortex shedding and drag in a unitary Fermi superfluid
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• Generation of vortex dipoles in superfluid Fermi gas in BCS limit
• Viscous dissipation in a gas of one-dimensional fermions with generic dispersion
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• Anisotropic merging and splitting of dipolar Bose-Einstein condensates
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• Emptiness Instanton in Quantum Polytropic Gas