Control of the interaction in a Fermi-Bose mixture

Year: 2006

Authors: Zaccanti M., D’Errico C., Ferlaino F., Roati G., Inguscio M., Modugno G.

Autors Affiliation: LENS and Dipartimento di Fisica, Università di Firenze, and INFM-CNR, Via Nello Carrara 1, 50019 Sesto Fiorentino, Italy

Abstract: We control the interspecies interaction in a two-species atomic quantum mixture by tuning the magnetic field at a Feshbach resonance. The mixture is composed by fermionic (40)K and bosonic (87)Rb. We observe effects of the large attractive and repulsive interaction energy across the resonance, such as collapse or a reduced spatial overlap of the mixture, and we accurately locate the resonance position and width. Understanding and controlling instabilities in this mixture opens the way to a variety of applications, including formation of heteronuclear molecular quantum gases.

Journal/Review: PHYSICAL REVIEW A

Volume: 74      Pages from: 041605-1  to: 041605-4

More Information: Erzincan Üniversitesi, EU, MEIF-CT-2004-009939, HPRICT1999-00111. Ministero dell’Istruzione, dell’Università e della Ricerca, MIUR. – We acknowledge contributions by A. Simoni and M. Modugno, and critical reading of the manuscript by C. Fort. F.F. is also at Institut für Experimental Physik, Universität Innsbruck, Austria. This work was supported by MIUR, by EU under Contracts HPRICT1999-00111 and MEIF-CT-2004-009939, by Ente CRF, Firenze and by CNISM, Progetti di Innesco 2005.
KeyWords: Mixtures; Resonance, Control of the interaction; Fermi-Bose mixtures; Feshbach resonances; Heteronuclear; Interspecies interactions; Repulsive interaction energy; Resonance position; Spatial overlap, Gases
DOI: 10.1103/PhysRevA.74.041605

Citations: 95
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