Skip to content

UltraCold Atom News

Sections
Personal tools
Home » News » BEC over troubled water?

BEC over troubled water?

Back to News

Group: Van Druten

Authors and contributors: Aaldert van Amerongen, Jan-Joris van Es, Philipp Wicke and Klaasjan van Druten

On Tuesday April 25, 2006 we observed our first Bose-Einstein condensate (BEC) on a chip in the "CELSIUS" experiment. The signature was the sudden appearance of an anisotropically expanding cloud when smoothly increasing the phase-space density through forced evaporative cooling.

Since then, we have optimized our evaporation trajectory and made various other improvements. Now we routinely reach Bose-Einstein condensation at at a temperature of around Tc = 1.5 µK, with 105 atoms (87Rb), in a cylindrically symmetric harmonic trap. Further evaporative cooling results in a nearly pure condensate of about twenty thousand atoms.

The images below (taken in August 2006) show a cloud just above the critical temperate (left), a partially condensed cloud (middle), and a nearly pure condensate (right) respectively.

Posted: 04 Oct 2006     Date: 25 Apr 2006


Conferences
Workshop on Quantum State Engineering
29 Mar 2017
Hannover, Germany
PQI 2017
26 Apr 2017
Pittsburgh Quantum Institute
 

© 2005-2017
Contact us | About the site | Link to the site