Real space dynamics of attractive and repulsive polarons in Bose-Einstein condensates
We investigate the formation of a Bose polaron when a single impurity in a Bose-Einstein condensate is quenched from a non-interacting to an attractively interacting state in the vicinity of a Feshbach resonance. We use a beyond-Fr\"ohlich Hamiltonian that is able to cover both sides of the res...
Gespeichert in:
| Hauptverfasser: | , , |
|---|---|
| Dokumenttyp: | Article (Journal) Kapitel/Artikel |
| Sprache: | Englisch |
| Veröffentlicht: |
26 Oct 2018
|
| In: |
Arxiv
|
| Online-Zugang: | Verlag, Volltext: http://arxiv.org/abs/1810.11296
|
| Verfasserangaben: | Moritz Drescher, Manfred Salmhofer, and Tilman Enss |
| Zusammenfassung: | We investigate the formation of a Bose polaron when a single impurity in a Bose-Einstein condensate is quenched from a non-interacting to an attractively interacting state in the vicinity of a Feshbach resonance. We use a beyond-Fr\"ohlich Hamiltonian that is able to cover both sides of the resonance and the Lee-Low-Pines variational ansatz to compute the time-evolution of Boson density profiles in position space. We find that on the repulsive side of the Feshbach resonance, the system keeps oscillating with a characteristic frequency for which we derive an implicit equation and discuss to what extent this can be interpreted as a competition between a molecular and a repulsive polaron state. If the impurity is introduced at finite velocity, it is periodically slowed down or even arrested before speeding up again. |
|---|---|
| Beschreibung: | Identifizierung der Ressource nach: Last revised 1 Feb 2019 Gesehen am 08.12.2020 |
| Beschreibung: | Online Resource |