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Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions [dataset] Open Access

We probe the collective dynamics of a quantum degenerate Bose-Bose mixture of $^{133}$Cs and $^{174}$Yb with attractive interspecies interactions. Specifically, we excite vertical center of mass oscillations of the Cs condensate. We observe significant damping for the Cs dipole mode, due to the rapid transfer of energy to the larger Yb component and the ensuing acoustic dissipation. Numerical simulations based on coupled Gross-Pitaevskii equations provide excellent agreement with experiment, and additionally reveal the possibility of late-time revivals (beating) which are found to be highly sensitive to the Cs and Yb atom number combinations. By further tuning the interaction strength of Cs using a broad Feshbach resonance, we explore the stability of the degenerate mixture. We observe collapse of the Cs condensate mediated by the attractive Cs-Yb interaction when $a_{\rm{Cs}}<50 \, a_0$, well above the single-species collapse threshold, in good agreement with simulations.

Descriptions

Resource type

Dataset

Contributors

Creator: Wilson, Kali ¹
Creator: Guttridge, Alex ¹
Creator: Liu, I-Kang ²
Creator: Segal, Jack ¹
Creator: Thomas Billam ²
Creator: Parker, Nick ²
Creator: Proukakis, Nick ²
Creator: Cornish, Simon ¹

¹ Durham University, UK
² Newcastle University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Data files used in "Dynamics of a degenerate Cs-Yb mixture with attractive interspecies interactions". For more information refer to the README.txt file included in data zip file.

Keyword

Ultracold atoms
Atomic Physics
Bose-Einstein condensates
Quantum mixtures

Subject

Location

Language

Cited in

arxiv:2012.11008

Identifier

ark:/32150/r2bk128991d
doi:10.15128/r2bk128991d

Rights

Creative Commons Attribution 4.0 International (CC BY)

Publisher

Durham University

Date Created

File Details

Depositor

K.E. Wilson

Date Uploaded

14 July 2021, 07:07:48

Date Modified

15 July 2021, 09:07:02

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Characterization

File format: zip (ZIP Format)

Mime type: application/zip

File size: 386274540

Last modified: 2021:07:14 12:12:17+01:00

Filename: CsYb_Data_Publish.zip

Original checksum: 7c39adfc6a71189fd900b2260724071e