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Dynamical response of a Bose-Einstein condensate to a discontinuous change in internal state

M. R. Matthews·D. S. Hall·D. S. Jin·J. R. Ensher·C. E. Wieman·E. A. Cornell·F. Dalfovo·C. Minniti·S. Stringari
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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).

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M. R. Matthews, D. S. Hall, D. S. Jin, J. R. Ensher, C. E. Wieman, E. A. Cornell, F. Dalfovo, C. Minniti, S. Stringari. 1998-06-06. Dynamical response of a Bose-Einstein condensate to a discontinuous change in internal state. https://doi.org/10.1103/physrevlett.81.243

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