Journal
NEW JOURNAL OF PHYSICS
Volume 22, Issue 4, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab7599
Keywords
Bose polarons; ultracold atomic mixtures; induced interactions; quench dynamics; correlated dynamics
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [SFB 925]
- University of Hamburg
- Okinawa Institute of Science and Technology Graduate University
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We study the ground state properties and non-equilibrium dynamics of two spinor bosonic impurities immersed in a one-dimensional bosonic gas upon applying an interspecies interaction quench. For the ground state of two non-interacting impurities we reveal signatures of attractive induced interactions in both cases of attractive or repulsive interspecies interactions, while a weak impurity-impurity repulsion forces the impurities to stay apart. Turning to the quench dynamics we inspect the time-evolution of the contrast unveiling the existence, dynamical deformation and the orthogonality catastrophe of Bose polarons. We find that for an increasing postquench repulsion the impurities reside in a superposition of two distinct two-body configurations while at strong repulsions their corresponding two-body correlation patterns show a spatially delocalized behavior evincing the involvement of higher excited states. For attractive interspecies couplings, the impurities exhibit a tendency to localize at the origin and remarkably for strong attractions they experience a mutual attraction on the two-body level that is imprinted as a density hump on the bosonic bath.
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