Shock waves in strongly interacting Fermi gas from time-dependent density functional calculations

Abstract

Motivated by a recent experiment [Phys. Rev. Lett. 106, 150401 (2011)] we simulate the collision between two clouds of cold Fermi gas at unitarity conditions by using an extended Thomas-Fermi density functional. At variance with the current interpretation of the experiments, where the role of viscosity is emphasized, we find that a quantitative agreement with the experimental observation of the dynamics of the cloud collisions is obtained within our superfluid effective hydrodynamics approach, where density variations during the collision are controlled by a purely dispersive quantum gradient term. We also suggest different initial conditions where dispersive density ripples can be detected with the available experimental spatial resolution.

5 pages, 4 figures, to be published in Phys. Rev. A

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Cited by in corpus (5)

• Towards Quantum Turbulence in Cold Atomic Fermionic Superfluids
• Phase-induced transport in atomic gases: from superfluid to Mott insulator
• Critical velocity, vortex shedding and drag in a unitary Fermi superfluid
• Dispersive effects in the unitary Fermi gas
• Correlations and synchronization in a Bose-Fermi mixture