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Transporting cold atoms between distant sections of a vacuum system is acentral ingredient in many quantum simulation experiments, in particular insetups, where a large optical access and precise control over magnetic fieldsis needed. In this work, we demonstrate optical transport of cold cesium atomsover a total transfer distance of about $43\,$cm in less than $30\,$ms. Thehigh speed is facilitated by a moving lattice, which is generated via theinterference of a Bessel and a Gaussian laser beam. We transport about $3\times10^6$ atoms at a temperature of a few $\mu$K with a transport efficiency ofabout $75\%$. We provide a detailed study of the transport efficiency fordifferent accelerations and lattice depths and find that the transportefficiency is mainly limited by the potential depth along the direction ofgravity. To highlight the suitability of the optical-transport setup forquantum simulation experiments, we demonstrate the generation of a pureBose-Einstein condensate with about $2\times 10^4$ atoms. We find a robustfinal atom number within $2\%$ over a duration of $2.5\,$h with a standarddeviation of $<5\%$ between individual experimental realizations.

Fast long-distance transport of cold cesium atoms