Controlled expansion of shell-shaped Bose-Einstein condensates

ORAL

Abstract

Motivated by the recent experimental realization of ultracold quantum gases in shell topology [1], we propose a straightforward implementation of matter-wave lensing techniques for shellshaped Bose-Einstein condensates [2]. This approach allows to significantly extend the free evolution time of the condensate shell after release from the trap and enables the study of novel quantum many-body effects on curved geometries. With both analytical and numerical methods, we derive optimal parameters for realistic schemes to conserve the shell shape of the condensate for times up to hundreds of milliseconds.

[1] R. A. Carollo et al., Nature (London) 606, 281 (2022).

[2] P. Boegel et al., arXiv:2209.04672 (2022).

*This project is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) due to an enactment of the German Bundestag under Grants Nos. 50WM1862 and 50WM2245B (CAL).

–

Publication: P. Boegel et al., arXiv:2209.04672 (2022).

Presenters

  • Alexander Wolf

    • German Aerospace Center, Institute of Quantum Technologies

Authors

  • Patrick B Boegel

    • Ulm University, Institut für Quantenphysik
    • Institut für Quantenphysik, Ulm University, Ulm, Germany

  • Alexander Wolf

    • German Aerospace Center, Institute of Quantum Technologies

  • Matthias Meister

    • German Aerospace Center, (DLR), Institute of Quantum Technologies, Ulm, Germany
    • German Aerospace Center, Institute of Quantum Technologies
    • German Aerospace Center (DLR), Institute of Quantum Technologies, Ulm, Germany

  • Maxim Efremov

    • German Aerospace Center, Institute of Quantum Technologies