Real space dynamics of attractive and repulsive polarons in Bose-Einstein condensates

• Verfasst von: Drescher, Moritz [VerfasserIn]
• Verfasst von: Salmhofer, Manfred [VerfasserIn]
• Verfasst von: Enss, Tilman [VerfasserIn]
• Titel: Real space dynamics of attractive and repulsive polarons in Bose-Einstein condensates
• Verf.angabe: Moritz Drescher, Manfred Salmhofer, and Tilman Enss
• E-Jahr: 2018
• Jahr: 26 Oct 2018
• Umfang: 15 S.
• Fussnoten: Identifizierung der Ressource nach: Last revised 1 Feb 2019 ; Gesehen am 08.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2018
• Band/Heft Quelle: (2018) Artikel-Nummer 1810.11296, 15 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Condensed Matter - Quantum Gases
• Sach-SW: Condensed Matter - Strongly Correlated Electrons
• K10plus-PPN: 158493686X

Abstract

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.