A compact experimental machine for studying tunable Bose-Bose superfluid mixtures
Abstract
We present a compact and versatile experimental system for producing Bose-Bose superfluid mixtures composed of sodium and potassium atoms. The compact design combines the necessary ultra-high vacuum enviroment for ultracold atom experiments with efficient atomic fluxes by using two-dimensional magneto-optical traps as independent source of atoms. We demonstrate the performance of this new machine by producing a Bose-Einstein condensate of Na with atoms. The tunability of Na-K bosonic mixtures is particularly interesting for studies regarding the nucleation of vortices and quantum turbulence. In this direction, the large optical access of the science chamber along the vertical direction provides the conditions to implement high resolution optical setups for imaging and rotating the condensate with a stirring beam. We show the nucleation of a vortex lattice with up to 14 vortices in the Na BEC, attesting the efficiency of the experimental apparatus in studying the dynamics of vortices.
Cite
@article{arxiv.1901.01089,
title = {A compact experimental machine for studying tunable Bose-Bose superfluid mixtures},
author = {P. C. M. Castilho and E. Pedrozo-Peñafiel and E. M. Gutierrez and P. L. Mazo and G. Roati and K. M. Farias and V. S. Bagnato},
journal= {arXiv preprint arXiv:1901.01089},
year = {2019}
}