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 40K and bosonic 87Rb. 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.
Control of the interaction in a Fermi-Bose atomic mixture / M. ZACCANTI; C. DERRICO; F. FERLAINO; G. ROATI; M. INGUSCIO; G. MODUGNO. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - STAMPA. - 74:(2006), pp. 041605-041605. [10.1103/PhysRevA.74.041605]
Control of the interaction in a Fermi-Bose atomic mixture
INGUSCIO, MASSIMO;MODUGNO, GIOVANNI
2006
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 40K and bosonic 87Rb. 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.File | Dimensione | Formato | |
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