Dynamical Response of a Bose-Einstein Condensate to a Discontinuous Change in Internal State

Phys. Rev. Lett. 81, 243 – Published 13 July 1998
M. R. Matthews, D. S. Hall, D. S. Jin, J. R. Ensher, C. E. Wieman, E. A. Cornell, F. Dalfovo, C. Minniti, and S. Stringari

Abstract

A two-photon transition is used to convert an arbitrary fraction of the 87Rb atoms in a |F=1,mf=-1 condensate to the |F=2,mf=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).

DOI: http://dx.doi.org/10.1103/PhysRevLett.81.243

  • Received 11 March 1998
  • Published in the issue dated 13 July 1998

© 1998 The American Physical Society

Authors & Affiliations

M. R. Matthews, D. S. Hall, D. S. Jin*, J. R. Ensher, C. E. Wieman, and E. A. Cornell

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

F. Dalfovo, C. Minniti, and S. Stringari

  • Dipartimento di Fisica, Università di Trento, and Istituto Nazionale Fisica della Materia, I-38050 Povo, Italy

  • *Quantum Physics Division, National Institute of Standards and Technology.

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