Dynamical formation of polarons in a Bose-Einstein condensate

A variational approach

verfasst von
L. A.Pena Ardila
Abstract

We investigate the nonequilibrium dynamics of an impurity coupled to a Bose-Einstein condensate, systematically compared with recent experimental results [M. G. Skou, Nat. Phys. (2021)10.1038/s41567-021-01184-5]. The dynamics of the impurity is tracked down by using a time-dependent variational coherent ansatz. For weak coupling between the impurity and the bath, analytical expressions for the time-dependent contrast are derived, matching quite well with previous findings obtained within a master equation approach. For strong coupling instead, the variational ansatz provides a good quantitative description of the polaron dynamics, in particular, in signaling the transition from the few- to the many-body correlated regime where polarons are expected to form.

Organisationseinheit(en)
Institut für Theoretische Physik
QuantumFrontiers
Typ
Artikel
Journal
Physical Review A
Band
103
ISSN
2469-9926
Publikationsdatum
23.03.2021
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Atom- und Molekularphysik sowie Optik
Elektronische Version(en)
https://arxiv.org/abs/2012.11591 (Zugang: Offen)
https://doi.org/10.1103/PhysRevA.103.033323 (Zugang: Geschlossen)