Abstract
We have performed precision microwave spectroscopy on ultracold confined in a magnetic trap, both above and below the Bose-condensation transition. The cold collision frequency shifts for both normal and condensed clouds were measured, which allowed the intrastate and interstate density correlations (characterized by sometimes controversial “factors of 2”) to be determined. Additionally, temporal coherence of the normal cloud was studied, and the importance of mean-field and velocity-changing collisions in preserving coherence is discussed.
- Received 13 August 2002
DOI:https://doi.org/10.1103/PhysRevA.66.053616
©2002 American Physical Society