{sup 39}K Bose-Einstein Condensate with Tunable Interactions

Journal Article · Fri Jul 06 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.010403· OSTI ID:20957846

Roati, G; Zaccanti, M; D'Errico, C; Catani, J; Inguscio, M; Modugno, G ^[1]; Modugno, M ^[2]; Simoni, A ^[3]

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1. LENS and Dipartimento di Fisica, Universita di Firenze, INFN (Italy) and CNR-INFM, 50019 Sesto Fiorentino (Italy)
2. LENS and Dipartimento di Matematica Applicata, Universita di Firenze, INFN (Italy) and BEC-INFM Center, Universita di Trento, I-38050 Povo (Italy)
3. Laboratoire de Physique des Atomes, Lasers, Molecules et Surfaces, Unites Mixtes de Recherche 6627 du CNRS and Universite de Rennes, 35042 Rennes Cedex (France)

We produce a Bose-Einstein condensate of {sup 39}K atoms. Condensation of this species with a naturally small and negative scattering length is achieved by a combination of sympathetic cooling with {sup 87}Rb and direct evaporation, exploiting the magnetic tuning of both inter- and intraspecies interactions at Feshbach resonances. We explore the tunability of the self-interactions by studying the expansion and the stability of the condensate. We find that a {sup 39}K condensate is interesting for future experiments requiring a weakly-interacting Bose gas.

• OSTI ID: 20957846
• Journal Information: Physical Review Letters, Vol. 99, Issue 1; Other Information: DOI: 10.1103/PhysRevLett.99.010403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
BOSE-EINSTEIN GAS
EVAPORATION
EXPANSION
MASS NUMBER
POTASSIUM 39
RUBIDIUM 87
SCATTERING LENGTHS