Document Type

Article

Publication Date

Summer 7-24-2008

Publication Title

Physical Review Letters

ISSN

0031-9007

Volume

101

Issue

4

First Page

040402-1

Last Page

040402-4

DOI

10.1103/PhysRevLett.101.040402

Abstract

We report on the observation of controllable phase separation in a dual-species Bose-Einstein condensate with 85Rb and 87Rb. Interatomic interactions between the different components determine the miscibility of the two quantum fluids. In our experiments, we can clearly observe immiscible behavior via a dramatic spatial separation of the two species. Furthermore, a magnetic-field Feshbach resonance is used to change them between miscible and immiscible by tuning the 85Rb scattering length. The spatial density pattern of the immiscible quantum fluids exhibits complex alternating-domain structures that are uncharacteristic of its stationary ground state.

Comments

Published as "Tunable Miscibility in a Dual-Species Bose-Einstein Condensate" (http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.101.040402)

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