A new quantum gas apparatus for ultracold mixtures of K and Cs and KCs ground-state molecules

摘要

We present a new quantum gas apparatus for ultracold mixtures of K and Csatoms and ultracold samples of KCs ground-state molecules. We demonstrate theapparatus' capabilities by producing Bose-Einstein condensates (BEC) of 39K and133Cs in a manner that will eventually allow sequential condensation within oneexperimental cycle, precise sample overlap, and magnetic association of atomsinto KCs molecules. The condensates are created independently without relyingon sympathetic cooling. Our approach is universal and applicable to otherspecies combinations when the two species show dramatically different behaviorin terms of loss mechanisms and post laser cooling temperatures, i.e. speciescombinations that make parallel generation of quantum degenerate sampleschallenging. We give an outlook over the next experiments involving e.g. samplemixing, molecule formation, and transport into a science chamber forhigh-resolution spatial imaging of novel quantum-many body phases based onK-Cs.