Collective excitation of a Bose-Einstein condensate by modulation of the atomic scattering length
- Pollack, S. E.
- Dries, D.
- Hulet, R. G.
- Magalhaes, K. M. F.
- Henn, E. A. L.
- Ramos, E. R. F.
- Caracanhas, M. A.
- Bagnato, V. S.
DOIAbstract
We excite the lowest-lying quadrupole mode of a Bose-Einstein condensate by modulating the atomic scattering length via a Feshbach resonance. Excitation occurs at various modulation frequencies, and resonances located at the natural quadrupole frequency of the condensate and at the first harmonic are observed. We also investigate the amplitude of the excited mode as a function of modulation depth. Numerical simulations based on a variational calculation agree with our experimental results and provide insight into the observed behavior.NSFONRKeck FoundationWelch FoundationFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Rice Univ, Dept Phys & Astron, Houston, TX 7...
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