A double species 23Na and 87Rb Bose–Einstein condensate with tunable miscibility via an interspecies Feshbach resonance. (24th November 2015)

• Record Type: Journal Article
• Authors: Wang, Fudong; Li, Xiaoke; Xiong, Dezhi; Wang, Dajun
• Is Part Of: Journal of physics. Volume 49:Number 1(2016:Jan. 01)
• Publication Date: 2015-11-24
• Subjects: double BEC -- interspecies Feshbach resonance -- tunable interaction; 03.75.Mn -- 03.75.Hh -- 34.50.-s; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/49/1/015302
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We have realized a dual-species Bose–Einstein condensate (BEC) of 23 Na and 87 Rb atoms and observed its immiscibility. Because of the favorable background intra- and inter-species scattering lengths, stable condensates can be obtained via efficient evaporative cooling and sympathetic cooling without the need for fine tuning of the interactions. Our system thus provides a clean platform for studying inter-species interactions–driven effects in superfluid mixtures. With a Feshbach resonance, we have successfully created double BECs with largely tunable inter-species interactions and studied the miscible–immiscible phase transition.