Abstract
Techniques to manipulate the individual constituents of an ultracold mixture are key to investigating impurity physics. In this work, we confine a mixture of hyperfine ground states of 87Rb atoms in a double-well potential. The potential is produced by dressing the atoms with multiple radiofrequencies. The amplitude and phase of each frequency component of the dressing field are controlled to independently manipulate each species. Furthermore, we verify that our mixture of hyperfine states is collisionally stable, with no observable inelastic loss.
Highlights
Cold atom experiments have emerged as a valuable tool to engineer many-body quantum systems [1, 2]
In which a minority species interacts with a large reservoir of a second species, can be studied by immersing probes into a larger quantum system, which necessitates a means of control for separate constituents of the mixture [10]
We have experimentally realised species-selective manipulations of an atomic mixture using multiple RF (MRF)-dressed potentials, which are made possible by the different gF of the constituents
Summary
Cold atom experiments have emerged as a valuable tool to engineer many-body quantum systems [1, 2]. RF-dressed potentials are species-selective for mixtures of atoms with differing magnetic moments, for instance where the magnitude or sign of the Landé g-factor for each constituent is distinct [37,38,39,40]. Exploiting this feature, we implement a species-selective double well using MRFdressed potentials and manipulate the spatial distribution of the individual mixture constituents.
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