Abstract
We identify an eigenvalue associated with a dilute two-species Bose-Einstein condensate as the determiner of condensate stability. It plays the same role as the sign of scattering length in a one-species condensate. We predict that there is a range of interspecies interaction strength in which a sodium-rubidium mixture can be stable in a harmonic trap.
- Received 4 June 1997
DOI:https://doi.org/10.1103/PhysRevLett.79.3105
©1997 American Physical Society