Feshbach resonances in an ultracold mixture of 87Rb and 40K

doi:10.1088/1674-1056/20/10/103401

Abstract We report the experimental preparations of the absolute ground states of ⁸⁷Rb and ⁴⁰K atoms (|F=1, m_F=1,〉+ |F=9/2, m_F=-9/2〉) by means of the radio-frequency and microwave adiabatic rapid passages, and the observation of magnetic Feshbach resonances in an ultracold mixture of bosonic ⁸⁷Rb and fermionic ⁴⁰K atoms between 0 T and 6.0 × 10^-2 T, including 7 homonuclear and 4 heteronuclear Feshbach resonances. The resonances are identified by the abrupt trap loss of atoms induced by the strong inelastic three-body collisions. These Feshbach resonances should enable the experimental control of interspecies interactions.

Keywords: adiabatic rapid passages homonuclear Feshbach resonance heteronuclear Feshbach resonances

Received: 16 March 2011
Revised: 11 April 2011
Accepted manuscript online:

PACS:	34.20.Cf	(Interatomic potentials and forces)
	32.80.Pj
	03.75.Ss	(Degenerate Fermi gases)

Fund: Project supported by the National Natural Science Foundation for Distinguished Young Scholars of China (Grant No. 10725416), the National Basic Research Program of China (Grant No. 2006CB921101), the National Natural Science Foundation of China for Excellent Research Team, China (Grant No. 60821004).

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Wang Peng-Jun(王鹏军), Fu Zheng-Kun(付正坤), Chai Shi-Jie(柴世杰), and Zhang Jing(张靖) Feshbach resonances in an ultracold mixture of ⁸⁷Rb and ⁴⁰K 2011 Chin. Phys. B 20 103401

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Feshbach resonances in an ultracold mixture of 87Rb and 40K

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Feshbach resonances in an ultracold mixture of ⁸⁷Rb and ⁴⁰K