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Quantum degenerate mixtures of Cs and Yb [dataset] Open Access

We report the production of quantum degenerate Bose-Bose mixtures of Cs and Yb with both attractive (Cs + $^{174}$Yb) and repulsive (Cs + $^{170}$Yb) interspecies interactions. Dual-species evaporation is performed in a bichromatic optical dipole trap that combines light at 1070\,nm and 532\,nm to enable control of the relative trap depths for Cs and Yb. Maintaining a trap which is shallower for Yb throughout the evaporation leads to highly efficient sympathetic cooling of Cs for both isotopic combinations at magnetic fields close to the Efimov minimum in the Cs three-body recombination rate at around 22\,G. For Cs + $^{174}$Yb, we produce quantum mixtures with typical atom numbers of $N_\mathrm{Yb} \sim 5 \times 10^4$ and $N_\mathrm{Cs} \sim 5 \times 10^3$. We find that the attractive interspecies interaction (characterised by the scattering length $a_\mathrm{CsYb} = -75\,a_0$) is stabilised by the repulsive intraspecies interactions. For Cs + $^{170}$Yb, we produce quantum mixtures with typical atom numbers of $N_\mathrm{Yb} \sim 4 \times 10^4$, and $N_\mathrm{Cs} \sim 1 \times 10^4$. Here, the repulsive interspecies interaction ($a_\mathrm{CsYb} = 96\,a_0$) can overwhelm the intraspecies interactions, such that the mixture sits in a region of partial miscibility.

Descriptions

Resource type

Dataset

Contributors

Creator: Wilson, Kali ¹
Creator: Guttridge, Alexander ¹
Creator: Segal, Jack ¹
Creator: Cornish, Simon ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Data files used in "Quantum degenerate mixtures of Cs and Yb". For more information refer to the README.txt file included in data zip file.

Keyword

Ultracold atoms
Atomic physics
Bose-Einstein condesates

Subject

Location

Language

Cited in

arxiv:2011.05436

Identifier

ark:/32150/r19880vr01p
doi:10.15128/r19880vr01p

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

K.E. Wilson

Date Uploaded

7 January 2021, 16:01:11

Date Modified

23 February 2021, 09:02:59

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Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 45274339

Last modified: 2021:02:22 16:20:25+00:00

Filename: CsYb_Data_22022021.zip

Original checksum: f5556c600d48617b94404200c7c07428