Collective Excitations of Bose­-Einstein Condensates In Isotropic and Slightly Anisotropic Traps

POSTER

Abstract

Boltzmann proved that the monopole mode of a thermal gas in an isotropic, harmonic and 3D trap is undamped. Bose-Einstein Condensates (BECs) are not classical gases and their weakly interacting nature causes damping in a 3D monopole mode. The large parameter space of the TOP (Time-averaged Orbiting Potential) trap allows for precise control of the trap geometry. Exciting a monopole mode in a BEC as well as its canonical thermal cloud allows us to investigate damping effects in isotropic and slightly anisotropic traps for both hydrodynamic and collisionless regimes. We also hope to achieve a greater understanding of the frequency shifts due to anharmonicity in the trap in order to apply this to our research on quasi-2D monopole modes.

*Funding: NSF, NIST, ONR

Authors

  • Andrew Barentine

    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder

  • Dan Lobser

    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder

  • Heather Lewandowski

    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440
    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder

  • Eric Cornell

    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440
    • JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder
    • JILA