Free-fall expansion of finite-temperature Bose–Einstein condensed gas in the non-Thomas–Fermi regime

2008/11/11 by M. Zawada, R Abdoul, R. Abdoul +10
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.other

paper · pdf · doi:10.1088/0953-4075/41/24/241001

8 pages, 4 figures

arxiv created 2008/11/11 · openalex publication_date 2008/12/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report on our study of the free-fall expansion of a finite-temperature Bose-Einstein condensed cloud of 87Rb. The experiments are performed with a variable total number of atoms while keeping constant the number of atoms in the condensate. The results provide evidence that the BEC dynamics depends on the interaction with thermal fraction. In particular, they provide experimental evidence that thermal cloud compresses the condensate.

Citations

• Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor
• Experimental study of the thermodynamics of an interacting trapped Bose-Einstein condensed gas
• Reversible and irreversible evolution of a condensed bosonic gas
• Bose-Einstein Condensation in a Gas of Sodium Atoms