A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules. Issue 18 (10th October 2016)

• Record Type: Journal Article
• Authors: Gröbner, M.; Weinmann, P.; Meinert, F.; Lauber, K.; Kirilov, E.; Nägerl, H.-C.
• Is Part Of: Journal of modern optics. Volume 63:Issue 18(2016)
• Page Start: 1829
• Page End: 1839
• Publication Date: 2016-10-10
• Subjects: Cold atoms -- quantum gases -- strongly correlated systems -- Bose–Einstein condensation -- ultracold mixtures -- ground-state molecules; Optics -- Periodicals; 535
• DOI: 10.1080/09500340.2016.1143051
• Languages: English
• ISSNs: 0950-0340

Abstract

Abstract : We present a new quantum gas apparatus for ultracold mixtures of K and Cs atoms and ultracold samples of KCs ground-state molecules. We demonstrate the apparatus' capabilities by producing Bose–Einstein condensates of 39 K and 133 Cs in a manner that will eventually allow sequential condensation within one experimental cycle, precise sample overlap and magnetic association of atoms into KCs molecules. The condensates are created independently without relying on sympathetic cooling. Our approach is universal and applicable to other species combinations when the two species show dramatically different behavior in terms of loss mechanisms and post laser cooling temperatures, i.e. species combinations that make parallel generation of quantum degenerate samples challenging. We give an outlook over the next experiments involving e.g. sample mixing, molecule formation and transport into a science chamber for high-resolution spatial imaging of novel quantum-many body phases based on K–Cs.