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Ionic Impurity in a Bose-Einstein Condensate at Submicrokelvin Temperatures.

Author information

Affiliations

  • 1. 5. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.
      Authors
    • Kleinbach KS 1
    • Engel F 1
    • Dieterle T 1
    • Löw R 1
    • Pfau T 1
    • Meinert F 1
    (6 authors)

ORCIDs linked to this article

Physical Review Letters, 01 May 2018, 120(19):193401
https://doi.org/10.1103/physrevlett.120.193401 PMID: 29799221 

Abstract 

Rydberg atoms immersed in a Bose-Einstein condensate interact with the quantum gas via electron-atom and ion-atom interaction. To suppress the typically dominant electron-neutral interaction, Rydberg states with a principal quantum number up to n=190 are excited from a dense and tightly trapped micron-sized condensate. This allows us to explore a regime where the Rydberg orbit exceeds the size of the atomic sample by far. In this case, a detailed line shape analysis of the Rydberg excitation spectrum provides clear evidence for ion-atom interaction at temperatures well below a microkelvin. Our results may open up ways to enter the quantum regime of ion-atom scattering for the exploration of charged quantum impurities and associated polaron physics.

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Read article at publisher's site: https://doi.org/10.1103/physrevlett.120.193401

Read article for free, from open access legal sources, via Unpaywall: http://arxiv.org/pdf/1802.08587Unpaywall

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Funding 

Funders who supported this work.

Baden-Württemberg Stiftung

    Carl-Zeiss foundation

      Deutsche Forschungsgemeinschaft (2)