22–26 Nov 2021
AlbaNova Main Building
Europe/Stockholm timezone
Please note: ECTI 2021 will be held as a hybrid event.

Ions in atomic Bose-Einstein condensates and Fermi gases

24 Nov 2021, 14:30
30m
Online via Zoom

Online via Zoom

invited talk online ECTI

Speaker

Georg Morten Bruun (Aarhus University)

Description

We investigate the properties of ions immersed in an atomic Bose-Einstein condensate (BEC) or an ultracold Fermi gas using variational and diagrammatic methods. For both cases, we show that the ion can form several quasiparticle states, which are charged analogues of the Fermi and Bose polarons observed in neutral atomic gases. Due to the long-range nature of the atom-ion interaction, these ionic polarons have several properties distinct from their neutral counterparts such as the simultaneous presence of several stable states and smooth transitions from repulsive to attractive polarons with increasing interaction strength. We also show that an ion in a BEC can form a number of charged molecular states by binding an increasing number of bosons. Finally, we discuss the induced interaction between two ions mediated by density oscillations in the surrounding medium.

Primary author

Georg Morten Bruun (Aarhus University)

Presentation materials

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