Related Experiment Videos
Direct observation of the phonon energy in a Bose-Einstein condensate by tomographic imaging
Roee Ozeri1, Jeff Steinhauer, Nadav Katz
1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel.
Physical Review Letters
|June 13, 2002
Abstract:
The momentum and energy of phonons in a Bose-Einstein condensate are measured directly from a time-of-flight image by computerized tomography. We find that the same atoms that carry the momentum of the excitation also carry the excitation energy. The measured energy is in agreement with the Bogoliubov spectrum. Hydrodynamic simulations are performed which confirm our observation.