Transition to hydrodynamics in colliding fermion clouds

Abstract

We study the transition from the collisionless to the hydrodynamic regime in a two-component spin-polarized mixture of 40K atoms by exciting its dipolar oscillation modes inside harmonic traps. The time evolution of the mixture is described by the Vlasov-Landau equations and numerically solved with a fully three-dimensional concurrent code. We observe a master/slave behaviour of the oscillation frequencies depending on the dipolar mode that is excited. Regardless of the initial conditions, the transition to hydrodynamics is found to shift to lower values of the collision rate as temperature decreases.

11 pages, iop style. submitted to the proceedings of the Levico 2003 workshop

References in corpus (10)

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Cited by in corpus (13)

• Sound propagation in elongated superfluid fermion clouds
• Numerical solution of the Boltzmann equation for the collective modes of trapped Fermi gases
• Dynamics of a trapped Fermi gas in the BCS phase
• Direct Simulation Monte Carlo method for cold atom dynamics: classical Boltzmann equation in the quantum collision regime
• Shape oscillations in non-degenerate Bose gases - transition from the collisionless to the hydrodynamic regime
• Collective modes of trapped Fermi gases with in-medium interaction
• Role of fourth-order phase-space moments in collective modes of trapped Fermi gases
• Numerical solution of the Boltzmann equation for trapped Fermi gases with in-medium effects
• Coupling of hydrodynamics and quasiparticle motion in collective modes of superfluid trapped Fermi gases
• Zero and First Sound in Normal Fermi Systems
• Undamped nonequilibrium dynamics of a nondegenerate Bose gas in a 3D isotropic trap
• Sound wave propagation in strongly elongated fermion clouds at finite collisionality
• Effects of collisions against thermal impurities in the dynamics of a trapped fermion gas