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, and S. Stringari
Phys. Rev. Lett. 81, 243 – Published 13 July 1998
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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).

  • Received 11 March 1998

DOI:https://doi.org/10.1103/PhysRevLett.81.243

©1998 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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Vol. 81, Iss. 2 — 13 July 1998

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