Echo spectroscopy of bulk Bogoliubov excitations in trapped Bose-Einstein condensates

Details Echo spectroscopy of bulk Bogoliubov excitations in trapped Bose-Einstein condensates Echo spectroscopy of bulk Bogoliubov excitations in trapped Bose-Einstein condensates

2003-09-25

arxiv.org/abs/cond-mat/0309584v1

Physics

Condensed Matter

4 pages, 5 figures

Scientific paper

10.1103/PhysRevA.69.041604

We propose and demonstrate an echo method to reduce the inhomogeneous linewidth of Bogoliubov excitations, in a harmonically-trapped Bose-Einstein condensate. Our proposal includes the transfer of excitations with momentum +q to -q using a double two photon Bragg process, in which a substantial reduction of the inhomogeneous broadening is calculated. Furthermore, we predict an enhancement in the method's efficiency for low momentum due to many-body effects. The echo can also be implemented by using a four photon process, as is demonstrated experimentally.

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