Long Bragg pulses were used to spectroscopically measure the first and zeroth order radial modes in the phonon spectrum of a Bose-Einstein condensate. These high-resolution measurements agree well with simulations of the Gross-Pitaevskii equation. The local density approximation failed to reproduce these multiple radial modes.
|Original language||American English|
|Journal||Physical Review Letters|
|State||Published - 14 Feb 2003|
Bibliographical noteFunding Information:
This work is partially supported by MIUR-COFIN2000 and the Israel Science Foundation.