Abstract
A Bose-Einstein condensate in three-dimensional free space is known to be unstable against expansion or collapse if the scattering length of atoms is constant. We propose a method to produce a stable self-trapped condensate in which nondestructive measurement of the condensate’s peak density is used to perform feedback control of the scattering length. The stability is shown to be robust against experimental imperfections in the measurements.
- Received 8 May 2006
DOI:https://doi.org/10.1103/PhysRevA.74.023602
©2006 American Physical Society