Document Type

Article

Publication Date

Fall 11-22-2002

Publication Title

Physical Review A

ISSN

1050-2947

Volume

66

Issue

5

First Page

053616-1

Last Page

053616-6

DOI

10.1103/PhysRevA.66.053616

Abstract

We have performed precision microwave spectroscopy on ultracold 87Rbconfined 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.

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