Dynamical response of a Bose-Einstein condensate to a discontinuous change in internal state
arXiv:cond-mat/9803310 · doi:10.1103/PhysRevLett.81.243
Abstract
A two-photon transition is used to convert an arbitrary fraction of the 87Rb atoms in a |F=1,m_f=-1> condensate to the |F=2,m_f=1> state. Transferring the entire population imposes a discontinuous change on the condensate's mean-field repulsion, which leaves a residual ringing in the condensate width. A calculation based on Gross-Pitaevskii theory agrees well with the observed behavior, and from the comparison we obtain the ratio of the intraspecies scattering lengths for the two states, a_|1,-1> / a_|2,1> = 1.062(12).
4 pages, 3 figures
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