Dr Nir Navon
Title: Turbulence in a Quantum Gas
For the past two decades harmonically trapped ultracold atomic gases have been used with great success to study fundamental many-body physics in a flexible experimental setting. Recently, we achieved the first atomic Bose-Einstein condensate (BEC) in an essentially uniform potential of an optical-box trap , which has opened new possibilities for closer connections with condensed-matter systems, and theories of the many-body problem that generally rely on the translational symmetry of the system. In this talk, I will present a recent study of a uniform Bose gas driven far-from-equilibrium by a periodic force, leading to a turbulent steady state. By contrast to traditional turbulent fluids, this system exhibit a synthetic dissipation scale, due to the finite box trap depth. This allows for a direct measurement of turbulent-cascade fluxes, and the possibility to explore how these fluxes depend on the dissipation scale. Our conclusions are well supported by comparison with numerical simulations of the Gross-Pitaevskii equation.
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