Thermalization of a trapped single atom with an atomic thermal bath

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Colleges, School and Institutes

External organisations

  • University of Birmingham
  • Università di Pisa


We studied a single atom trapped in an optical tweezer interacting with a thermal bath of ultracold atoms of a different species. Because of the collisions between the trapped atom and the bath atoms, the trapped atom undergoes changes in its vibrational states occupation to reach thermal equilibrium with the bath. By using Monte Carlo simulations, we characterized the single atom’s thermalization process, and we studied how this can be used for cooling. Our simulations demonstrate that, within known experimental limitations, it is feasible to cool a trapped single atom with a thermal bath.

Bibliographic note

Funding Information: Funding: All authors are supported by the Leverhulme Trust Research Project Grant UltraQuTe (grant number RGP-2018-266). A.M. is supported by the Erasmus programme.


Original languageEnglish
Article number2258
JournalApplied Sciences (Switzerland)
Issue number5
Publication statusPublished - 4 Mar 2021